STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Intestinal villi. Coloured scanning micrograph (SEM) of villi (rounded folds) in the jejunum (part of the small intestine). Villi are finger-like projections in the intestines that increase the surface area available for the absorption of nutrients. Mucus (red) is seen between the villi. Magnification: x115 when printed at 10 centimetres across.
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