Search results
Results from the WOW.Com Content Network
Epithelial cells feature distinct 'apical', 'lateral' and 'basal' plasma membrane domains. Epithelial cells connect to one another via their lateral membranes to form epithelial sheets that line cavities and surfaces throughout the animal body. Each plasma membrane domain has a distinct protein composition, giving them distinct properties and ...
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 .
The brush border on the apical surface of the epithelial cells is covered with glycocalyx, which is composed of oligosaccharides attached to membrane glycoproteins and glycolipids. [7] TEM image of a thin section cut through an epithelial cell showing the luminal surface (apical end) of the cell packed with microvilli that make up the absorbing ...
Language links are at the top of the page across from the title.
The apical ectodermal ridge (AER) is a structure that forms from the ectodermal cells at the distal end of each limb bud and acts as a major signaling center to ensure proper development of a limb. After the limb bud induces AER formation, the AER and limb mesenchyme —including the zone of polarizing activity (ZPA)—continue to communicate ...
Retrolateral refers to the surface of a leg that is closest to the posterior end of an arachnid's body. [73] Most spiders have eight eyes in four pairs. All the eyes are on the carapace of the prosoma , and their sizes, shapes and locations are characteristic of various spider families and other taxa . [ 74 ]
In addition to defining asymmetric axes in the adult organism, cell polarity also regulates both individual and collective cell movements during embryonic development such as apical constriction, invagination, and epiboly. These movements are critical for shaping the embryo and creating the complex structures of the adult body.
The hollow inner part of a body organ (such as the gastrointestinal tract) or tube (such as an artery) is called the lumen. The side of a cell facing the lumen is called the apical surface; the opposite side, facing away from the lumen is the basolateral surface, which faces instead towards the interstitium, and away from the lumen.