BIOL 1840U Lecture Notes - Simple Columnar Epithelium, Cholecystokinin, Muscularis Mucosae

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29 Jan 2013
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Introduction: largest gland in body (~3. 5 lbs in adult, composed of 4 incompletely separated lobes; lies in ruq, has thin connective tissue capsule (glisson"s capsule) Inflow: portal vein carries venous blood from gi (nutrient rich, o2 poor); supplies. & portal vein (interlobar blood vessels) central veins sinusoids . Liver exocrine function bile secretion: bile formed continuously in liver; composed of bile salts & pigments. & foreign particles: formation, bile salts cholesterol derivatives; powerful detergents aiding in emulsification of fats, bile pigments derived from degradation of hgb & excreted via gi. Duodenum (form) common bile duct (join to form) common hepatic. Sphincter of: bile canaliculi limiting wall composed of apical hepatocyte membranes w/ tight jxns, eventually gain walls composed of cuboidal cells w/ basal lamina & microvilli ii. In the liver, bile flows opposite the direction of blood: reabsorption bile salts (not pigment) are reabsorbed in ileum & transported to liver via portal vein, stimulus.

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