The Lower Esophageal Sphincter Separates the Stomach and the Esophagus

Question

The lower esophageal sphincter separates the stomach and the esophagus.

Accepted Answer

The lower esophageal sphincter, often abbreviated as LES, is a bundle of muscles that separates the esophagus and the stomach. Its main function is to prevent stomach contents from flowing back up into the esophagus.