What is the Sphincter That Allows Food to Enter the Stomach

Question

What is the sphincter that allows food to enter the stomach from the esophagus?
A) Sphincter of Oddi
B) Pyloric sphincter
C) Lower esophageal sphincter
D) Oral sphincter

Accepted Answer

The lower esophageal sphincter (LES) is a circular muscle located at the junction of the esophagus and stomach. It allows food to enter the stomach from the esophagus and prevents stomach acid from flowing back up into the esophagus. The other options, such as the sphincter of Oddi and pyloric sphincter, are located in different parts of the digestive system and have different functions. The oral sphincter is not a real anatomical term and does not refer to any specific muscle or structure.