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Lower digestive system

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Lower digestive system

The parts of the lower digestive system.

The lower digestive system includes the last part of the small intestine, the large intestine (ascending colon, transverse colon, descending colon, and sigmoid colon), and the rectum.

Current as of: May 1, 2026

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

Current as of: May 1, 2026

Author: WebMD Ignite Staff

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

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This information does not replace the advice of a doctor. WebMD Ignite, 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. Learn how we develop our content.

NOTICE: This health information was not created by Columbia University Irving Medical Center and may not necessarily reflect specific CUIMC practices. For medical advice to your personal condition, please consult your doctor. Medical advice disclaimer.