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34.5 MB (4.8 MB compressed)
3012 x 4000 pixels
25.4 x 33.8 cm ⏐ 10.0 x 13.3 in (300dpi)
STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Intestinal lining. Coloured scanning electron micrograph (SEM) of villi (red) from the lining of the duodenum, the first part of the small intestine. Villi are finger-like projections that increase the surface area available for the absorption of nutrients. Cell within the villi produce mucus (green), a slippery substance that protects the lining and eases the passage of food along the intestines. Magnification: x250 at 10 centimetres wide.
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