BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY
Light micrograph showing longitudinal section of colon mucosa and glands in colonic villi. Colon lining. Coloured light micrograph of a section through a human colon. The colon is lined with intestinal villi containing crypts of Lieberkuhn, elongated pockets that lie in the vascular submucosa. These glands contain two types of cells: goblet cells, which secrete a lubricant into the colon which aids the movement of faeces; and absorptive columnar epithelial cells, which absorb water from the faeces.
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