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A peg cell is a non-ciliated epithelial secretory cell within the uterine tube (oviduct or fallopian tube). [1] These cells represent one of three epithelial cell types found within the normal fallopian tube epithelium and only make up around 10% of the total number of cells. The other two cell types are ciliated columnar and intercalary cells. [1]
Peg laterals typically occur on both sides, [2] and have short roots. [2] Inheritance may be involved, [ 2 ] and the frequency of microdontia in the upper laterals is just under 1%. [ 1 ] The second most commonly involved tooth is the maxillary third molars, [ 3 ] and after this supernumerary teeth .
It consists of one or more layers of epithelial cells overlying a layer of loose connective tissue. It is mostly of endodermal origin and is continuous with the skin at body openings such as the eyes , eyelids , ears , inside the nose , inside the mouth , lips , the genital areas , the urethral opening and the anus .
Changes indicative of disease are seen as alterations in the oral mucosa lining the mouth, which can reveal systemic conditions, such as diabetes or vitamin deficiency, or the local effects of chronic tobacco or alcohol use. [3] The oral mucosa tends to heal faster and with less scar formation compared to the skin. [4]
Water is absorbed here and the remaining waste matter is stored prior to defecation. [2] There are many specialised cells of the GI tract. These include the various cells of the gastric glands, taste cells, pancreatic duct cells, enterocytes and microfold cells.
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The gastrointestinal tract (GI tract, digestive tract, alimentary canal) is the tract or passageway of the digestive system that leads from the mouth to the anus.The GI tract contains all the major organs of the digestive system, in humans and other animals, including the esophagus, stomach, and intestines.
[19] [20] In the mouth, mucins can also recruit anti-microbial proteins such as statherins and histatine 1, which further reduces risk of infection. [ 20 ] Eleven mucins are expressed by the eye surface epithelia, goblet cells and associated glands, even though most of them are expressed at very low levels.