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Small Intestine - Anatomy & Physiology (view source)
Revision as of 19:33, 5 July 2008
, 19:33, 5 July 2008→Duodenum
===Duodenum===
===Duodenum===
*The mucosa is arranged into 'villi' that provide a large surface area for absorption.
*The mucosa is arranged into villi that provide a large surface area for absorption.
*Epithelium is simple columnar - ideal for absorption.
*Epithelium is simple columnar - ideal for absorption.
**Epithelial cells are known as enterocytes.
**Epithelial cells are known as enterocytes.
*Each villus houses capillaries that transport amino acids, monosaccharides and other digestive products and lacteals that transport triacylglycerides.
*Each villus houses capillaries that transport amino acids, monosaccharides and other digestive products and lacteals that transport triacylglycerides.
*Crypts are present at the base of each villus.
*Crypts are present at the base of each villus.
Produces an alkaline secretion, which neutralises stomach acid, and digestive enzymes.
===Jejunum===
===Jejunum===