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small intestine

the small intestine is a winding, tightly folded tube about 6 m (20 ft) long in adults. it is connected to the stomach on the top end and to the large intestine (colon) on the bottom end.

most of the food a person consumes is digested and absorbed in the small intestine. the lining of the small intestine has tiny finger-shaped raised tissues (villi). these raised tissues greatly increase the surface area of the intestine, which absorbs calories and nutrients from food.

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this information does not replace the advice of a doctor. healthwise, incorporated, disclaims any warranty or liability for your use of this information. your use of this information means that you agree to the terms of use and privacy policy. to learn more about healthwise, visit healthwise.org. © 1995-2022 healthwise, incorporated. healthwise, healthwise for every health decision, and the healthwise logo are trademarks of healthwise, incorporated.

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