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Microvilli (sg.: microvillus) are microscopic cellular membrane protrusions that increase the surface area for diffusion and minimize any increase in volume, [1] and are involved in a wide variety of functions, including absorption, secretion, cellular adhesion, and mechanotransduction.
Microvilli are membrane protuberances that arise from epithelial cells. They are usually about 0.1µm in diameter and up to 2 µm long. These microvilli are shorter and narrower than cilia but thicker than cilia.
microvillus, any of numerous microscopic bristlelike protrusions that occur on the surface of a wide variety of cell types, including intestinal epithelial cells, neurons, photoreceptors (light-sensitive cells), and certain cells of the immune system, such as dendritic cells and lymphocytes.
Microvilli are tiny, finger-like projections found on the surface of epithelial cells throughout the body, particularly in the small intestine. These structures significantly increase the surface area of the cells, enhancing their ability to absorb nutrients and other substances.
Microvilli are polymorphic class protuberances surface found in some tissues and are loosely positioned in others. When compared with cilia, they are smaller and shorter. From a microscopic observation, you’ll see microvilli as bundles of cross-linked actin fibers. They are extensions in the cells but have little to no organelles.
Microvilli are finger-like membrane protrusions, supported by the actin cytoskeleton, and found on almost all cell types. A growing body of evidence suggests that the dynamic lymphocyte microvilli, with their highly curved membranes, play an important role in signal transduction leading to immune responses.
Microvilli are the minute cylindrical processes on the free surface of a cell, organized around a core of cross-linked actin filaments anchored to the terminal web, which increase the surface size of the cell; found especially in cells of the proximal convolution of the renal tubules and of the intestinal epithelium (Dorland, 2011).
Microvilli are tiny, finger-like projections on the surface of epithelial cells lining the intestines, which increase the surface area for absorption. They play a crucial role in the digestion and absorption of nutrients by expanding the cell's surface exposed to the intestinal lumen.
The specific localization on microvilli of important functional membrane proteins such as glucose transporters, ion channels, ion pumps, and ion exchangers indicate the importance and diversity of microvillar functions.
Microvilli are essentially a plasma membrane supported by a network of microfilaments and cytoplasm. They are tiny projections that exist on, in, and around cells.