Villus surface of the small intestine, SEM

Villus surface of the small intestine, SEM

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Credit: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY

Caption: Villus surface of the small intestine; columnar epithelial cells, coloured scanning electron micrograph (SEM). The smooth portion of image shows the surface of the villus with densely packed columnar epithelia cells. The rough portion shows a longitudinal view of the columnar epithelial cells. The small intestine is the part of the gastrointestinal tract between the stomach and the large intestine. It is where most of the digestion and absorption of food takes place, via the villi, which increase its surface area. The villi have an outer epithelial cell layer (columnar epithelial cells) that possess many tiny microvilli. Microvilli are tiny finger-like projections, which increase the surface area available for absorption of nutrients such as lipids, proteins and fat-soluble vitamins. The microvilli have a rapid turnover of 3-4 days. Magnification: x265 when shortest axis printed at 25 millimetres.

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Keywords: 84102c, colored, coloured, columnar epithelial cell, columnar epithelial cell layer, columnar epithelial cell layers, columnar epithelial cells, cross section, duodenum, epithelia, epithelial cell, epithelial cell layer, epithelial cells, epithelium, false-colored, false-coloured, gastrointestinal tract, human, human body, human intestine, ileum, intestinal cell microvilli, intestinal tract, intestine, intestine absorption, intestine cell microvilli, intestine digestion, intestine epithelia, intestine epithelium, intestine microvilli, jejunum, lamina propia mucosa, microvilli, microvilli adsorption, microvillus, nutrient absorption, plicae circulares, scanning electron micrograph, sem, small, small bowel, small intestine, small intestine epithelia, small intestine epithelium, small intestine microvilli, small intestine microvillus, tem, transmission electron micrograph, villi, villus

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