NPB 101 Lecture Notes - Lecture 33: Salivary Gland, Palatine Uvula, Lysozyme
28 Nov 2017
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Document Summary
Lips & tongue contain food in mouth; guide food during chewing & swallowing. Teeth begin mechanical breakdown by chewing of food. Palate roof of the oral cavity: separates oral cavity from nasal passage, allows chewing and breathing to occur simultaneously. Uvula soft tissue that hands from the rear of the mouth and seals off nasal passage during swallowing. Digestion of carbohydrates (polysaccharides) starts in the mouth. Orophayryngeal stage moves bolus through pharynx and into esophageus. During this time, food must be prevented from: re-entering the mouth. Esophageal stage peristaltic waves move bolus into stomach. The stomach is a j shaped chamber located between the esophagus and the small intestine. It can be divided into 3 section: fundus located above the gastroesophageal sphincter, body the middle portion, antrum bottom portion, thick layer of smooth muscle, connected to small intestine by the pyloric sphincter. Functions: store, gastric secretion, converts pulverized food to chime. Gastric filling gastric volume can expand.
