Preferred Label : stomach;
Uberon definition : An expanded region of the vertebrate alimentary tract that serves as a food storage
compartment and digestive organ. A stomach is lined, in whole or in part by a glandular
epithelium.;
Uberon related term : anterior intestine; gaster; mesenteron;
Uberon narrow term : stomach chamber;
Uberon Homology note : It appears that the stomach has an ancient origin. The stomach first appears in the
fish lineage. The prevertebrate chordates do not have a true stomach, whereas the
cartilaginous and bony fish do. Although most fish do have a true stomach, some fish
species appear to have lost the stomach secondarily. The remaining vertebrate lineages
do have a true stomach (at least in the adult animal), although there is great variation
in the size and shape of the stomach.[well established][VHOG];
Uberon Taxon note : We restrict this to the vertebrate specific structure - see the grouping class 'food
storage organ' for analogous structures in other species. Teleosts: Zebrafish is functionally
stomach-less, but may retain ontogenic footprint. Although the precise shape and size
of the stomach varies widely among different vertebrates, the relative positions of
the oesophageal and duodenal openings remain relatively constant. As a result, the
organ always curves somewhat to the left before curving back to meet the pyloric sphincter.
However, lampreys, hagfishes, chimaeras, lungfishes, and some teleost fish have no
stomach at all, with the oesophagus opening directly into the intestine. The gastric
lining is usually divided into two regions, an anterior portion lined by fundic glands,
and a posterior with pyloric glands. Cardiac glands are unique to mammals, and even
then are absent in a number of species. The distributions of these glands vary between
species, and do not always correspond with the same regions as in man. Furthermore,
in many non-human mammals, a portion of the stomach anterior to the cardiac glands
is lined with epithelium essentially identical to that of the oesophagus. Ruminants,
in particular, have a complex stomach, the first three chambers of which are all lined
with oesophageal mucosa;
Origin ID : 0000945;
UMLS CUI : C0038351;
Automatic exact mappings (from CISMeF team)
- stomach [Artificial nutrition thesaurus concept]
- Semantic type(s)
- UMLS correspondences (same concept)
- Uberon cross reference
- adjacent to
- contributes to morphology of
- has part
- innervated by
- part of
An expanded region of the vertebrate alimentary tract that serves as a food storage
compartment and digestive organ. A stomach is lined, in whole or in part by a glandular
epithelium.
