HHP 3500 Lecture Notes - Lecture 42: Submucosa, Muscularis Mucosae, Portal Venous System
16 Nov 2016
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Document Summary
Stomach works primarily on breaking apart proteins. Regulates gastric emptying rate, rate at which chyme is dumped into small intestine (about 3 ml/min: small intestine-most digestion and absorption occurs. Carbs are digested into monosaccharides, fats into fatty acids, and proteins into amino acids: large intestine. Different parts: ascending colon, transverse colon, descending colon, sigmoid colon, rectum. Function is to store undigested food before elimination, and absorbs some water and salts. Contains lots of gut bacterial microbiota: anus-whatever not absorbed by the body is excreted as feces. Accessory organs of digestion: function to add secretions to the gi tract that will act on lumen, salivary glands, liver-exocrine function and bile salt production. Bile is made in liver and stored in gallbladder. Bile is made of hco3, cholesterol phospholipids, bile pigments, bile salts. It travels from liver to gall bladder via hepatic duct when food signals: gall bladder, pancreas-has endocrine and exocrine functions. Endocrine- secretes insulin and glucagon into blood.
