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Small Intestine - Anatomy & Physiology (view source)
Revision as of 19:51, 5 July 2008
, 19:51, 5 July 2008→Duodenum
**Enterocytes ane absorptive and posses microvilli.
**Enterocytes ane absorptive and posses microvilli.
*Membrane bound enzymes and transport proteins are also within the epithelium.
*Membrane bound enzymes and transport proteins are also within the epithelium.
*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. Lacteals drain into the lymphatic system.
*Crypts are present at the base of each villus.
*Crypts are present at the base of each villus in the mucosa. Cell types in mucosal crypts (from Luminas to basal):
**''goblet''at the tip of the crypt. Produce mucous by exocytosis.
**''entero-endocrine''in the middle of the crypt. Secrete peptides and amines.
**''paneth''at the base of the crypt. Function unknown. Contain eosinophilic granules.
*Brunner's glands produce an alkaline secretion which neutralises stomach acid.
===Jejunum===
===Jejunum===