STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Intestinal microvilli. Coloured scanning electron micrograph (SEM) of a section through the lining of the small intestine, showing the densely packed microvilli (hair-like, top). These tiny structures form a dense brush-like covering on the absorptive surfaces of the cells lining the small intestine. The cells absorb nutrients from digested food through the microvilli. Magnification: x8000, when printed 10 centimetres wide.
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