ANAT 101 Lecture 25: Lecture #25 - Digestive System II .doc

• School: Queen's University
• Department: Anatomy and Cell Biology
• Course: ANAT 101
• Professor: Richard Oko

Document Summary

Covered in villi and microvilli mucosa - innermost layer submucosa muscularis externa adventitia - outermost layer. Lecture #25 - digestive system ii: muscular tube, upper esophageal sphincter, lower esophageal sphincter, esophageal hiatus. Peristalsis: allows single directional movement of food, contraction, outer layer contracts, series of circular layer contractions that propel the food to move forward. Stomach: temporarily store food, mechanically break down food, chemically break down food, secretes intrinsic factors. Lecture #25 - digestive system ii cardia fundus body pylorus. Stomach muscle layers strongest: oblique fibres pyloric sphincter: very muscular. Variation in stomach position empty -> very full. Histology of the stomach gastric pit: communicates with gastric glands gastric gland. Stomach ulcer: stomach acid can penetrate into mucosa. Peritoneum peritoneum: serous membrane that lines the abdominal cavity visceral peritoneum parietal peritoneum - covers body wall mesentery: double layer peritoneum that suspends from posterior wall (when peritoneum meet) Hold organs in place intraperitoneal: organs completely covered by visceral peritoneum.