What are the names and functions of the stomach sphincters?

The stomach has two primary sphincters: the lower esophageal sphincter (LES) and the pyloric sphincter. The LES, located at the junction of the esophagus and stomach, prevents the backflow of stomach contents into the esophagus, protecting it from acid reflux. The pyloric sphincter, situated between the stomach and the small intestine, regulates the passage of partially digested food (chyme) from the stomach into the duodenum, ensuring proper digestion and absorption.