HTHSCI 1H06 Lecture Notes - Lecture 16: Splanchnic Nerves, Carboxypeptidase, Lacteal

• School: McMaster University
• Department: Health Sciences
• Course: HTHSCI 1H06
• Professor: Peter Helli

Document Summary

Overview of the digestion process: the main function of the intestines is absorption of nutrients into the bloodstream and lymphatics; chemical digestion continues into the proximal component of the small intestine. The small intestine: the small intestine has the same four layers (mucosa, submucosal, muscularis, and serosa) with some structural alterations. It involves the plicae circularis, villi, microvilli, mesentery, and miscellaneous cells: the plicae circularis is prominent and dense folds of the mucosal layers that increase surface area for absorption and aid in chemical digestion. It drains into the splenic vein, which dumps into the hepatic portal vein: the pancreaticoduodenal vein drains the first segment of the duodenum. It drains into the superior mesenteric vein, which dumps into the hepatic portal vein. It has the largest luminal diameter: major site of absorption for ca2+ and fe. Motility: patterns of intestinal contractions: there are different patterns of intestinal contractions depending on the state of the body, fed pattern occurs during feeding.