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12.0 MB (1.2 MB compressed)
1632 x 2560 pixels
13.7 x 21.6 cm ⏐ 5.4 x 8.5 in (300dpi)
STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Rectal polyp. Coloured scanning electron micrograph (SEM) of a polyp from the rectum, the last section of the large intestine. Polyps are usually benign growths (adenomas) that protrude from a mucous membrane. Most polyps are connected to the lining of the large intestine by a short stalk. As polyps can become cancerous, they are often surgically removed as a precautionary measure. Magnification unknown.
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