What is a villi in science?

Answer 1

The villi are tiny hair-like appendages which line the small intestine. They increase the surface area of the intestine, helping digestion due to their rich blood supply and single-celled wall, they are able to absorb nutrients. A person with coeliac disease has less, or deficient villi, meaning they are unable to absorb everything they need, ie gluten.

Answer 2

A villus or villi (pl.) are small finger-like folds and projections covered on the internal surface of the jejunum and ileum (small intestine). Its function is to make absorption of nutrients more efficient. The ileum and jejunum both have a thin lining to let the products of digestion rapidly pass through and enter the bloodstream or the lacteal. These nutrients which have been absorbed are now ready to be used as a fuel for energy. Each villus contains: # Thin-walled epithelial cells which are lined with microvilli and further increase their surface area (the bigger the surface area, the more nutrients it is able to absorb). # Many tiny blood vessels (capillaries) are extremely thin, consisting of a single layer of cells through which nutrients and soluble particles, including minerals and vitamins, are absorbed and transported to the hepatic portal vein. # A lacteal that transport fatty acids and glycerol into the lymph system which transports them to the circulatory system.

Answer 3

In science, a villus (plural: villi) is a small, finger-like projection found on the lining of the small intestine, which increases surface area for nutrient absorption. Villi contain blood vessels and lymphatic vessels that help transport nutrients from the intestines into the bloodstream.