stomach smooth muscle circular layer
http://purl.obolibrary.org/obo/UBERON_0008857
The middle layer of the muscularis; it is continuous with the circular layer of the esophagus, but is absent in the fundus and lies concentric to the longitudinal axis of the stomach; the circular layer is normally tonically constricted forming a functional pyloric sphincter, which controls the movement of chyme into the duodenum. [ MP:0010780 ]
Synonyms: stratum circulare tunicae muscularis gastricae, circular muscle layer of stomach, circular layer of gastric muscularis, stratum circulare (tunica muscularis)(gaster), middle circular muscle layer of stomach, stratum circulare gastris
Term info
- SCTID:2746007
- MA:0001628
- FMA:14911
pheno_slim
This layer wraps in a circular orientation around the pylorus, and is held in a constricted state normally. The normal constriction of this muscle is what creates the pyloric sphincter, which controls the movement of chyme into the duodenum. This layer is concentric to the longitudinal axis of the stomach. (note: chyme is a thick and acidic mixture of acidic digestive fluids and partially digested food, which moves from the stomach to the small intestine as digestion moves along the digestive tract.)
FMA and MP disagree as to whether the circular layer is middle or innermost
uberon
UBERON:0008857
stomach smooth muscle circular layer, Circular muscle layer of stomach