STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Intestinal villi. Scanning electron micrograph (SEM) of villi on the lining of the small intestine. Villi are finger-like projections that line the surface of the small intestine and increase the surface area available for the absorption of nutrients from digested food. Magnification: x135 when printed 10 centimetres wide.
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