Midterm paper

MODULE 9 LO4 Digestive Tract: Pharynx to Esophagus Dr. Lisa Brinn [email protected]

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4) Pharynx • Involved in digestion and respiration • Propels food

v oral cavity ➙ esophagus • Lubricates

v Food v Passageways

• Subdivisions: v Nasopharynx

o Breathing o Speech

v Oropharynx v Laryngopharynx involved in breathing and digestion

Esophagus • Upper esophageal sphincter

v Allows bolus to move from laryngopharynx to esophagus • Lower esophageal sphincter

v Allows bolus to move from esophagus to stomach v Prevents chyme from entering the esophagus

• Functions: v Propels food to stomach v Lubricates food and passageways