Small intestine villus, SEM

Small intestine villus, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Small intestine villus. Coloured scanning electron micrograph (SEM) of a freeze fracture section through a villus of the intestinal lining. Villi are finger-like projections that increase the surface area of a structure. The outer surface is mostly columnar epithelium (pink), which absorbs food. Within in the epithelium are goblet cells (dark pink ovals), which secrete mucus to lubricate food and prevent self-digestion. The lamina propria or central core (orange) contains the blood supply that transports the products of digestion, individual red blood cells (red) are seen within it. Magnification: x400 at 6x7cm size.

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Keywords: absorptive, absortion, alimentary canal, anatomy, cells, coloured, columnar, digestion, digestive system, enterocyte, enterocytes, epithelial, epithelium, fracture, goblet cell, gut, healthy, histology, human body, intestinal, lamina propria, lining, membrane, mucosa, mucous, mucus, normal, scanning electron micrograph, secretory, sem, small intestine, surface, tissue, villi, villus

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