ANAT 102 Lecture Notes - Lecture 17: Short-Chain Fatty Acid, High Fructose Corn Syrup, Portal Vein
19 Sep 2016
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Organs of the digestive system: lower digestive tract. Small intestine (si: majority of digestion and absorption happens in the small intestine o. Plicae circularis: unique to small intestine - folds to increase surface area for more absorption of nutrients o. Muscularis: has the myenteric plexus between the circular and longitudinal layers. Blood supply via arterioles and venules that goes up into the villi to receive nutrients from absorption and to go back through and then to bring it back to the liver more! There"s microvilli on the villi to increase surface area even. Lacteal: drain into the lymphatic system via the lymphatic vessel. Mucosa: different because they"re made of villi and have absorptive cells at the tip and are where the nutrients are absorbed. Paneth cells = immune macrophage cells (part of immune system) o. Digestion in the lumen of duodenum all these digestive enzymes are. Carbohydrates: digested by pancreatic amylase that makes glycogen and starch into smaller units.
