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small intestine
the upper part of the intestinal tract, consisting of the duodenum (connected to the stomach), the jejunum, and the ileum (connected to the large intestine). It is small in diameter but very long (over 6 meters). The digestion of food is completed here; digested food is absorbed
through the walls of the small intestine into the blood, and indigestible parts of the food pass along into the large intestine.

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