| intestinal villus n. Any of the many projections of the mucous membrane of the intestine that serve as sites of absorption and that are leaf-shaped in the duodenum and become shorter, more finger-shaped, and sparser in the ileum. |
villus
pl. villi [L.] a small process or protrusion, as from the free surface of a membrane.
arachnoid villus
microscopic projections of the arachnoid into some of the venous sinuses. Called also arachnoid granulations.
chorionic villus
threadlike projections originally occurring uniformly over the external surface of the chorion.
intestinal villus
multitudinous threadlike projections covering the surface of the mucous membrane lining the small intestine, serving as the sites of absorption of fluids and nutrients.
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Organization of an intestinal villus. By permission from Guyton R, Hall JE, Textbook of Medical Physiology, Saunders, 2000
synovial villus
slender projections from the surface of the synovial membrane into the cavity of a joint; called also haversian glands.
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