Villus
Villus
Villus (pronounced: /ˈvɪləs/) is a term used in anatomy and histology. It refers to a type of small, finger-like projection found in the small intestine. These projections increase the surface area of the intestine, allowing for greater absorption of nutrients.
Etymology
The term "villus" is derived from the Latin word "villus" which means "shaggy hair". This is a reference to the appearance of these structures, which resemble small tufts of hair.
Structure and Function
Each villus is lined with a layer of epithelial cells, which are responsible for the absorption of nutrients. The villi also contain a network of capillaries and lacteals, which transport the absorbed nutrients to the rest of the body.
Related Terms
- Microvilli: These are even smaller projections found on the epithelial cells of the villi. They further increase the surface area for absorption.
- Crypts of Lieberkühn: These are glandular structures found between the villi. They secrete enzymes and other substances necessary for digestion.
- Brush border: This is the term used to describe the combined appearance of the villi and microvilli. It resembles a brush due to the dense, hair-like projections.
See Also
External links
- Medical encyclopedia article on Villus
- Wikipedia's article - Villus
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