ALERT

We accept walk-ins at most designated COVID-19 sites during vaccination days and hours. You may still schedule your vaccination or walk up to our mobile vaccination clinic which is open to everyone! Note: we require masks in all St. Luke's facilities, regardless of COVID-19 vaccination status. This helps us provide safe care in a safe environment for all patients. Access more info on COVID testing, vaccination, visitor policy, safety practices, hospitalization data, and FAQs.
toggle mobile menu Menu
toggle search menu

Site Navigation

Supplemental

Menu

Small Intestine

Top of the page

Small Intestine

Parts of the small intestine

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.

Current as of: April 15, 2020

Author: Healthwise Staff
Medical Review:
E. Gregory Thompson MD - Internal Medicine
Adam Husney MD - Family Medicine

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. Healthwise is a URAC accredited health web site content provider. Privacy Policy. How this information was developed to help you make better health decisions.

To learn more, visit Healthwise.org

© 1995-2015 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.

Take Care, Someone Needs You.

You take care of others, so take care of yourself. Let us be your partner in health, whether you're recovering from an injury, checking in for your annual exam, or enjoying an online class.

Because when you take care of yourself, everyone around you benefits.

Quick Links
Connect with Us
Contact Us In Meridian (208) 706-5000