SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Microvilli in the intestine. Coloured scanning electron micrograph (SEM) of microvilli (red) on villi (orange) in the intestine. Villi are small folds in the inner lining of the intestine that serve to increase the area available for the absorption of nutrients and water. Microvilli are tiny folds on the surface of villi, which serve a similar purpose.
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