The duodenum is the first part of the small intestine. It is located between the stomach and the middle part of the small intestine, or jejunum.
The absorption of vitamins, minerals, and other nutrients begins in the duodenum.
Drake RL, Vogl W, Mitchell AWM. Abdomen. In: Drake RL, Vogl W, Mitchell AWM, Tibbitts RM, Richardson PE, eds. Gray's Atlas of Anatomy. 2nd ed. Philadelphia, PA: Elsevier Churchill Livingstone; 2015:chap 4.
Harris JW, Evers BM. Small intestine. In: Townsend CM, Beauchamp RD, Evers BM, Mattox KL, eds. Sabiston Textbook of Surgery. 20th ed. Philadelphia, PA: Elsevier; 2017:chap 49.
Review Date 12/10/2016
Updated by: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.