Bio47S11HO14 - Biology 47 Anatomy Lecture 14 Digestive...

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1 Biology 47 - Anatomy Lecture 14 Digestive System : Small Intestine : • Site of Digestion : ~ 90% nutrient : Rich blood supply for : General Physical features : ~ 20 ft (6) meters long : Supported by : Double sheets of : Functions : 1. Stabilize : 2. Prevent : 3. Conduit for : “Protected pathway to tissue” Secured to : General Histological Features : Macroscopic Folds : Permanent folds pulled by the : Enhance : 1. Increase : 2. Increase: Includes : Microscopic Folds : 1. Villi Folds including ONLY : Mucosa Increase Surface Area : Increased : Contain : a. Blood vessels : b. Lymph vessels : Lacteal
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2 Absorbs : Transport : 2. Microvilli : Folds of : Increase Surface Area : Increased Divided into 3 Regions : 1. Duodenum : “12 fingers” Shortest segment : Curves in a : Entrance regulated by : Receives : “ Mixing Bowl of chemicals a. Stomach : b. Small Intestine, Pancreas & Liver : Histology : Submucosal (Brunner’s) Glands Location : Function : Produce
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