Intestinal lining. Coloured scanning electron micrograph (SEM) of a freeze fracture section through the lining of the small intestine. Villi are finge
Intestinal lining. Coloured scanning electron micrograph (SEM) of a freeze fracture section through the lining of the small intestine. 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 this are goblet cells (purple ovals), which secrete mucus to lubricate food and prevent self-digestion. The lamina propria (green) contains the blood supply that transports the products of digestion. Magnification: x500 when printed 10 centimetres tall.
Size: 4000px × 4503px
Photo credit: © STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
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