Skip to Content
Home > Wellness Resources > Health Library > 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:
November 20, 2015
E. Gregory Thompson, MD - Internal Medicine & Adam Husney, MD - Family Medicine & Peter J. Kahrilas, MD - Gastroenterology
To learn more about Healthwise, visit Healthwise.org.
© 1995-2016 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.