ANAT 216 Lecture Notes - Lecture 14: Anal Canal, Inferior Mesenteric Artery, Ileocecal Valve
13 Oct 2016
School
Department
Course
Professor
Document Summary
Digestive system: lecture 3 (reading material: chapter 22: page 588; chapter 25: pages 676-682) Small intestine: 6 meters long, absorbs 90, gross anatomy: Mainly superior mesenteric artery from abdominal aorta. Superior mesenteric vein drains into the portal vein: histology: Villi - fingerlike projections: surface area. Simple columnar epithelium: mostly absorptive cells whose luminal surfaces bear microvilli (brush border) Surface area: between absorptive cells are goblet cells intestinal glands (crypts of lieberkuhn)- between the bases of the villi, absorptive and goblet cells, paneth cells: Secretion of pancreas and contraction of gallbladder: stem cells. Peyer"s patches get bigger the further you get down the intestine. Submucosa: in the duodenum contains duodenal (brunner"s) glands that secrete alkaline mucus. Peptic ulcers: usually found in duodenum. Stomach is built to sustain acid, duodenum is not: h. pylori infected ulcers. Now is treated with antibiotics so it can heal. Re-absorbs water and electrolytes: 3 parts:
