PSL301H1 Lecture Notes - Lecture 29: Gastric Mucosa, Intestinal Gland, Gastric Glands

• School: UTSG
• Department: Physiology
• Course: PSL301H1
• Professor: French, Gramolini, Richardson, Wong

Document Summary

Recall: specialized cells of the mucosa digestive tract and the accessory glands: scattered throughout the gi tract. Mass balance in the digestive system nutrients into the ecf (called enterocytes in the small intestine) equal the volume of fluid removed from the gi tract. There are also villi on the crypts. No resistance of materials going into the large intestine. Valleys are the crypts of liberkuhn, extending lumen of small intestine deep into mucosa: large intestine has valleys with the crypts of liberkuhn (no hills) Folds here look difference, the appearance of the haustra: microvilli in the small and large intestines absorption. Most absorption occurs in the microvilli which are microscopic protrusions found on the. They extend from the lumen surface, and gives the lumen the appearance of a brush . Chemical digestion begins with the secretion of salivary amylase and a very small amount. Saliva also dissolves food so that we can taste it.