ANAT 261 Lecture 18: Lecture 18 - intestine and colon
18 Feb 2019
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Lecture 18 small and large intestine and colon. Tip: in the exam, draw your general plan for all the systems we talked about: mucosa, epithelium: non-keratinized squamous stratified epithelium, lamina propria, muscularis mucosae, submucosa, loose or dense ct, muscularis, 2 sublayers. Internal circular: external longitudinal, serosa (or adventitia) In the esophagus, it"s important for lubrication (so food can slide down easily) Digestion: macromolecules partially digested in the stomach are further digested in the lumen of the small intestine largely by the action of pancreatic enzymes. Histologically these segments can be distinguished due to morphological differences at the level of the submucosa: submucosa is the distinguishing feature of what you"re looking at in the small intestine. In the stomach, the epithelium was pits and glands: when you get to the stomach the epithelium becomes villi and crypts (crypts of lieberk hn, lamina propria: underneath the epithelium, muscularis mucosa: it"s circular.
