Definitions for upper gastrointestinal tract
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U.S. National Library of Medicine
Upper Gastrointestinal Tract
The segment of GASTROINTESTINAL TRACT that includes the ESOPHAGUS; the STOMACH; and the DUODENUM.
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"upper gastrointestinal tract." Definitions.net. STANDS4 LLC, 2013. Web. 19 Jun 2013. <http://www.definitions.net/definition/upper gastrointestinal tract>.

