NCIt related terms : SMALL INTESTINE, DUODENUM; Duodenal structure (body structure);
NCIt definition : A jointed tube 25-30 cm long that connects the stomach to the jejunum.;
Alternative definition : CDISC: The portion of the small intestine between the stomach and jejunum.; NCI-GLOSS: The first part of the small intestine that connects to the stomach.; UBERON: The first part of the small intestine. At the junction of the stomach and
the duodenum the alimentary canal is inflected. The duodenum first goes anteriorly
for a short distance, turns dorsally, and eventually caudally, thus it is a U-shaped
structure with two horizontal sections (a ventral and a dorsal one).;