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). [ https://www.worldcat.org/search?q=bn%3A0815318960 http://en.wikipedia.org/wiki/Duodenum ]
Term information
- SCTID:181247007
- GAID:284
- OpenCyc:Mx4rv4LJDpwpEbGdrcN5Y29ycA
- EMAPA:18852
- VHOG:0000052
- EV:0100073
- UMLS:C0013303 (ncithesaurus:Duodenum)
- Wikipedia:Duodenum
- NCIT:C12263
- MAT:0000044
- CALOHA:TS-0214
- MA:0000338
- FMA:7206
- XAO:0000236
- galen:Duodenum
- MESH:D004386
- AAO:0010402
- MIAA:0000044
- EFO:0000851
- BTO:0000365
uberon_slim, efo_slim, pheno_slim, vertebrate_core, human_reference_atlas
The fixed portion of the small intestine deeply lodged in the posterior wall of the abdomen and extending from the pylorus to the beginning of the jejunum. [Dorian_AF, Elsevier's_encyclopaedic_dictionary_of_medicine, Part_B:_Anatomy_(1988)_Amsterdam_etc.:_Elsevier][VHOG]
In humans, the duodenum is a hollow jointed tube about 10-15 inches (25-38 centimetres) long connecting the stomach to the jejunum. It begins with the duodenal bulb and ends at the ligament of Treitz.
In fish, the divisions of the small intestine are not as clear, and the terms anterior intestine or proximal intestine may be used instead of duodenum.
Term relations
- subdivision of digestive tract
- continuous with some pylorus
- contributes to morphology of some small intestine
- proximalmost part of some small intestine
- part of some small intestine