Coloured SEM of villi in the duodenum

Coloured SEM of villi in the duodenum

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Credit: EYE OF SCIENCE/SCIENCE PHOTO LIBRARY

Caption: Duodenal villi. Coloured scanning electron micrograph (SEM) of villi in the duodenum, the upper part of the small intestine. Villi are folds in the duodenal wall, which project into the lumen. These folds greatly increase the absorptive and secretory surface of the duodenum. Digestive and stomach-acid neutralising enzymes are secreted by the duodenum, and food is further digested here. Nutrients from the food are then absorbed into the blood through capillaries which are contained in each villus. To aid food absorption, villi are more widely distributed in the duodenum than elsewhere in the intestine. Magnification: x152 at 6x7cm size. Magnification: x250at 4x5inch size.

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Keywords: anatomy, digestion, digestive system, duodenum, gut, human body, images, intestinal villi, intestine, lining, magnified image, microscopic photos, small intestine, subjects, team, teams, teamwork, together, togetherness, villi, villus

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