Cardiovascular and Respiratory Systems
BIOL2001C - Anatomy and Physiology I
University of Cincinnati
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
Air can be inhaled through the nose or mouth. If air is inhaled through the nose, it will first
travel through the nares, also known as the nostrils. The nares have a lining of coarse hair
(Acrobatiq, 2017). This hair filters and traps dirt and dust, helping to keep the airways clean.
Thenares are divided into right and left halves by the septum. The nasal cavity has three pairs
of conchae extending off it. These conchae make the surface area of the nasal cavity larger.
This allows air to come into better contact with the cavity walls and helps regulate airflow
during inhalation. The conchae are also lined with a mucous membrane, and this mucus helps
humidify and warm the air that comes into the nose. After air enters the nose, it passes into the
pharynx. The pharynx has three sections – the nasopharynx, the oropharynx, and the
laryngopharynx. It connects the nose to the larynx. If you breathe through your mouth, the air
will enter the oropharynx first. The oropharynx extends from the nasopharynx to the epiglottis.
The epiglottis keeps food from entering the airway but allows air to flow from the oropharynx
to the laryngopharynx. From the laryngopharynx, air goes into the larynx. The larynx brings
air from the laryngopharynx to the trachea. The trachea is the origin of the lower respiratory
tract. The trachea has three layers of mucosa that divide into the bronchi. The two bronchi go
to each lung and branch into smaller bronchioles. The bronchioles lead to the alveoli. Gas
exchange happens between the alveoli and capillaries. Oxygen enters the bloodstream at the
alveoli, and carbon dioxide exits the bloodstream through the alveoli and is exhaled. The
process restarts.
The right atrium takes oxygen-poor blood from the superior and inferior vena cava. The blood
moves through the tricuspid valve to the right ventricle. Valves keep blood flowing one way
through the cardiovascular system. The tricuspid valve divides the right atrium from the right
ventricle and prevents blood from flowing back to the right atrium. As the heart beats, the right
ventricle pumps blood through the pulmonic valve into the pulmonary arteries and then to the
lungs for oxygenation. The oxygenated blood flows through the pulmonary veins to the left
atrium. The left atrium sends the oxygenated blood through the mitral valve. The mitral valve
is located between the left atrium and the left ventricle and keeps blood from flowing
backwards to the atrium when the ventricle contracts. From there, blood enters the left
ventricle. The left ventricle pumps blood through the aortic valve to the aorta. The aorta feeds
blood to the rest of the body through a system of blood vessels. Blood returns to the heart
through the superior and inferior vena cava, which pump blood to the right atrium to restart the
process.
