pyloric sphincter The ring of muscle at the junction of the stomach and small intestine that regulates the movement of food into the small intestine. PICTURE ...
pyloric sphincter
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.
Food is mixed in the lower part of the stomach by peristaltic waves that also propel the acid-chyme mixture against the pyloric sphincter.
After being processed in the stomach, food is passed to the small intestine via the pyloric sphincter. The majority of digestion and absorption occur here as chyme enters the duodenum. Here it is further mixed with three different liquids: ...
 See also: Sphincter, Hormones, Protein, Smooth muscle, Action
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