lower esophageal sphincter

  • function in human digestive system

    TITLE: esophagus
    TITLE: swallowing
    ...within the esophagus push the food downward. Folds in the esophageal wall stretch out as materials pass by them and again contract once they have passed. At the lower end of the esophagus, the lower esophageal sphincter relaxes and food enters the stomach; the sphincter then closes again to prevent reflux of gastric juices and food materials.