Skip to Content
The small intestine is a winding, tightly folded tube about 20 ft (6 m) long in adults. It connects 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 tissues (villi). These raised tissues greatly increase the surface area of the intestine, which absorbs calories and nutrients from food.
The small intestine consists of three parts. The first part,
called the duodenum, connects to the stomach. The middle part is the
jejunum. The third part, called the ileum, attaches to the colon.
ByHealthwise StaffPrimary Medical ReviewerE. Gregory Thompson, MD - Internal MedicineAdam Husney, MD - Family MedicineSpecialist Medical ReviewerPeter J. Kahrilas, MD - Gastroenterology
Current as ofNovember 20, 2015
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.
© Copyright 2017 Rush-Copley Medical Center • 2000 Ogden Avenue; Aurora, IL 60504
Main: 630-978-6200 • Physician Referral & Information: 630-978-6700 or 866-4COPLEY (866-426-7539)