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microvillus
(redirected from microvilli)

   Also found in: Medical, Encyclopedia, Wikipedia 0.02 sec.
mi·cro·vil·lus  (mkr-vls)
n. pl. mi·cro·vil·li (-vl)
Any of the minute hairlike structures projecting from the surface of certain types of epithelial cells, especially those of the small intestine.

micro·villar (-lr) adj.

microvillus [ˌmaɪkrəʊˈvɪləs]
n pl -li [-laɪ]
(Life Sciences & Allied Applications / Physiology) Physiol a thin protuberance present in great abundance at the surface of some epithelial cells, notably in the gut, thus increasing the surface area available for absorption


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Delta containing vesicles traffic to the microvilli under normal circumstances.
The villi increase the intestinal absorptive surface area 300-fold and microvilli 600-fold, providing a massive absorption surface of the gut lumen for oral insulin.
The function of these three, the plicae circulares, the villi and the microvilli is to increase the amount of inner surface area of the intestine estimated to be 250 sq meters or about the surface size of a tennis court.
 
 
 
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