Intestinal villi

Intestinal villi


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Intestinal villi. Light micrograph of villi on the lining of the small intestine. Each fold of the wall of the small intestine is covered with these small projections called villi, which serve to increase the surface area for the absorption of nutrients from the gut lumen. Villi are mainly composed of columnar epithelial cells (purple) interspersed with goblet cells (pink). The goblet cells secrete mucous, which lines the surface of the membrane. The regularly ordered nuclei of the columnar cells are easily visible. The empty core of each villus is a lymphatic vessel that removes cellular waste. Magnification: x115 when printed 10cm wide.

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