a circular layer of muscle that separates the stomach from the duodenum of the small intestine

the sphincter muscle of the pylorus that separates the stomach from the duodenum

circular musculature that separates the stomach pyloris from the small intestine

A ring of smooth muscle surrounding the opening of the pyloric portion of the stomach into the intestine. The sphincter prevents premature escape of food from the stomach into the intestine before the food is properly digested.

The muscle located between stomach and small intestine. It regulates, in part, the emptying the cast of the stomach.

muscle between the stomach and the small intestine.

The ring of muscle at the junction of the stomach and small intestine that regulates the movement of food into the small intestine. PICTURE

The valve at the bottom of the stomach. The valve opens to allow digested food to move from the stomach through into the duodenum. See Duodenum.