anatomy 25 - SMALL INTESTINE Basic purpose is to absorb...

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SMALL INTESTINE - Basic purpose is to absorb nutrients o Simple sugars, fatty acids, nucleic acids, small proteins, Most complicated molecules, biggest molecules, you absorb, and therefore require the most surface area to absorb It takes a lot of energy and a lot of surface area to absorb out all the nutrients that your body needs Surface area is increased in four different ways (macro to micro): o Length of the small intestine is 10-11 feet (in a live person; in a cadaver its up to 20 feet) o Circular folds o Villi o Micrvovilli (membrane projections on the simple columnar cells) - Histology of the small intestine (26.9) o Wall of the small intestine is made up of four basic sections (from luminal side to outside): Mucosa Epithelium (luminal surface) o Micro-villiated simple columnar epithelium Micro-villi are for increased surface area Lamina propria o Loose connective tissue For blood supply Muscularis mucosae o Refers to the thin line in the illustration
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This note was uploaded on 03/18/2009 for the course BS 240 taught by Professor Zink during the Spring '09 term at University of the Sciences in Philadelphia.

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anatomy 25 - SMALL INTESTINE Basic purpose is to absorb...

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