Search results
Results from the WOW.Com Content Network
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.
Duodenum with brush border of microvilli. Illustration of the brush border membrane of small intestinal villi. A brush border (striated border or brush border membrane) is the microvillus-covered surface of simple cuboidal and simple columnar epithelium found in different parts of the body.
Intestinal villi (sg.: villus) are small, finger-like projections that extend into the lumen of the small intestine.Each villus is approximately 0.5–1.6 mm in length (in humans), and has many microvilli projecting from the enterocytes of its epithelium which collectively form the striated or brush border.
When they lack microvilli, they are characterized by their microfolds, and hence receive their commonly known name. These cells are far less abundant than enterocytes . These cells can also be identified by cytoskeletal and extracellular matrix components expressed at the edge of cells or on their cell surfaces, such as actin , villin ...
Microvilli on the apical surface increase its surface area. This facilitates transport of numerous small molecules into the enterocyte from the intestinal lumen . These include broken down proteins , fats , and sugars , as well as water, electrolytes , vitamins , and bile salts .
Absorptive columnar epithelium is characterized as having a striated border on its apical side, this border is made up of non-motile microvilli allowing for increase surface area for absorption. [1] These are known as non-ciliated columnar epithelium.
Decker continued, "Polk County’s location in the center of the state offers the same moderate Florida weather but with comparative affordability (median home price is ~100K less than Tampa and ...
Microvilli covering the apical surface of the enterocytes increase the absorptive surface twentyfold. These numerous microscopic (100 nanometers in diameter) finger-like projections form an undulated brush border .