microvilli


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microvilli

[-vil′ī]
Etymology: Gk, mikros, small; L, villus, shaggy hair
tiny hairlike folds in the plasma membrane that extend from the surface of many absorptive or secretory cells. They are most clearly visible with an electron microscope but may be seen as a "brush border" with a light microscope.
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Microvilli

microvilli

Microscopic hairlike projections above the surface of specialised epithelial cells, which are composed of complex plasma membrane folds surrounding an actin microfilament core. Microvilli greatly increase total cell surface, and therefore also the absorptive capacity of cell.

microvilli

The millions of tiny, hair-fine, finger-like protrusions on the surface cells of EPITHELIUM which greatly increase the effective surface area so as to facilitate absorption. Microvilli occur especially on the secretory and absorptive surfaces, and are formed by extensions of the cell membrane. They have a central core of actin filaments bound together with the protein VILLIN.

microvilli

minute projections of cell membrane; greatly increase cell surface area

microvilli

(mī´krōvil´ē),
n.pl tiny hairlike processes that extend from the surface of many cells. They are usually so small as to be visible only with an electron microscope.
References in periodicals archive ?
It has been suggested by previous studies that the functions of microvilli in the respiratory epithelium of the air-breathing organs of fish were to increase the surface area of its gas exchange (Huges and Munshi, 1973; Maina and Maloiy, 1986).
The pigment cells project microvilli apically, excreting a cuticular lens.
4: Distinct mucosal folds (MF) with oval or round shaped CEC and supported by microvilli (MV) under SEM observation (C x 200), 2.
The surface of the villi in different segments was not smooth but possessed few epithelial cells and microvilli.
The changes were congestion and haemorrhage of glomeruli, Tubular changes in PCT & DCT, were manifested as loss of microvilli with sloughing of epithelium, vacuolisation of cells leading to focal tubular atrophy and presence of RBC's in tubules.
In a microbiome that is off balance, the microvilli and the tight junctions found in the small intestine are not functioning properly.
Another cause for high histamine/diminished DAO activity is poor gut function, because it is primarily made in the microvilli of the GI tract.
Microvilli are tightly packed, microscopic projections of the apical surface of intestinal absorptive cells.
Known as MUC1, this forms the sticky coating, the glycocalyx, which covers the microvilli and microplicae on the surface of the corneal epithelium.
Such alterations characteristically lead to increased shedding of brush border membranes, accelerated cell-loss and shortened, sparse and irregular enterocyte microvilli, thus disrupting digestion and absorption.