Enterocyte

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Enterocyte

Enterocyte (pronounced: en-ter-o-site) is a type of cell found in the epithelium of the small intestine.

Etymology

The term "enterocyte" is derived from the Greek words "enteron" meaning intestine, and "kytos" meaning cell.

Definition

An enterocyte is a specialized epithelial cell that lines the inner surface of the small intestine and colon. These cells play a crucial role in the absorption of nutrients from the food we eat. They are responsible for the final stages of digestion and the uptake of nutrients into the bloodstream.

Structure

Enterocytes are columnar in shape and have a brush border of microvilli on their apical surface. This increases the surface area for absorption. They are joined together by tight junctions to prevent the passage of harmful substances into the bloodstream.

Function

The primary function of enterocytes is to absorb nutrients from the lumen of the small intestine into the bloodstream. They do this through a process called active transport, where nutrients are moved against a concentration gradient using energy. Enterocytes also have a role in the immune response of the gut, as they can present antigens to immune cells.

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