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What (who) is villus - definition
WIKIMEDIA DISAMBIGUATION PAGE
Villous; Vilose; Villus (disambiguation)
Villus
·noun Fine hairs on plants, resembling the pile of velvet.
II. Villus ·noun One of the minute papillary processes on certain vascular membranes; a villosity; as, villi cover the lining of the small intestines of many animals and serve to increase the absorbing surface.
villus
['v?l?s]
¦ noun (plural villi -l??, -li:) Anatomy any of numerous minute elongated projections set closely together on a surface, especially in the absorbent lining of the small intestine.
Derivatives
villiform adjective
villous adjective
Origin
C18: from L., lit. 'shaggy hair'.
Villous
·adj Furnished or clothed with villi.
II. Villous ·adj Abounding in, or covered with, fine hairs, or a woolly substance; shaggy with soft hairs; nappy.
Wikipedia
Villus
Villus (Latin: "shaggy hair", plural villi) may refer to:
- Intestinal villus, refers to any one of the small, finger-shaped outgrowths of the epithelial lining of the wall of the intestine. Clusters of projections are referred as intestinal villi.
- Chorionic villi, found on the surface of the outermost membrane (the chorion) of the fetus
- Arachnoid villi, located on the arachnoid membrane of the brain
Examples of use of villus
1. The traditional methods of testing for Down‘s syndrome are the amniocentesis, where samples are taken directly from the woman‘s amniotic sac; or by chronic villus testing, which takes cells from the placenta.
2. US health insurance does not cover the cost, which is similar to that of an ultrasound (which does not always accurately predict the baby‘s sex). Two invasive techniques, chorionic villus sampling (at 11 weeks) and amniocentesis (from 18 weeks), also provide information about genetic disorders (the kit does not), but can cause harm to the fetus in a small minority of cases.