Term Name:	stomach smooth muscle circular layer
Synonyms:	middle circular muscle layer of stomach, stratum circulare gastris
Definition:	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
Ontology:	Uberon Ontology [UBERON:0008857]