Gastrointestinal | Anatomy And Physiology: The Es...

If food gets stuck or moves too slowly, "stretch receptors" in the esophageal wall trigger a second wave to clear the remaining debris.

Located at the junction where the esophagus meets the stomach. Its primary job is to act as a one-way valve, letting food in but preventing caustic stomach acid from splashing back up. 3. Physiology: The Art of Peristalsis Gastrointestinal Anatomy and Physiology: The Es...

The esophagus is guarded at both ends by physiological valves known as sphincters: If food gets stuck or moves too slowly,