What Are The Sphincters In The Digestive System?
What Are The Sphincters In The Digestive System? Four distinct smooth muscle sphincters are present in the GI tract: the lower esophageal sphincter (LES), the pyloric sphincter (PS), the ileocecal sphincter (ICS), and the internal anal sphincter (IAS). Where are the 4 main sphincters of the digestive system located? Sphincters are specialized muscles that are