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25.8 MB (3.1 MB compressed)
2650 x 3400 pixels
22.4 x 28.7 cm ⏐ 8.8 x 11.3 in (300dpi)
STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Intestinal lining. Coloured scanning electron micrograph (SEM) of villi from the lining of the small intestine. Villi are finger-like projections that increase the surface area available for absorption of nutrients. Goblet cells (blue) on the villi secrete mucus (green), a slippery substance that protects the lining and eases the passage of food along the intestines.
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