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Health Library

Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Small intestine

The small intestine is a winding, tightly folded tube about 20 ft (6.1 m) 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.

Current as of: October 19, 2023

Author: Ignite Healthwise, LLC Staff

Clinical Review Board
All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.