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The Small Intestines

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Updated March 23, 2012

The Small Intestines
Photo © A.D.A.M.
The small intestine is about 24 feet long. It's a muscular tube that is divided into three distinct parts: duodenum, jejunum and ileum. The three parts are major sites of digestion and absorption. Absorption is a crucial part of the digestive system that brings the molecules from the digested food into the blood and, ultimately, the cells.
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