Stomach smooth muscle circular layer

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.

Also known as circular layer of gastric muscularis, circular muscle layer of stomach, middle circular muscle layer of stomach, stratum circulare (tunica muscularis)(gaster), stratum circulare gastris, stratum circulare tunicae muscularis gastricae — per UBERON

The Stomach smooth muscle circular layer is a part of the Digestive.

Also identified as

• SCTID 2746007 per UBERON