Gastrointestinal Anatomy And Physiology: The Es... May 2026

Occurs when the LES weakens, allowing acid to damage the esophageal lining.

The innermost lining, composed of stratified squamous epithelium . This tough, "multi-layered" tissue is designed to withstand the friction of coarse food particles. Gastrointestinal Anatomy and Physiology: The Es...

The primary function of the esophagus is . Once you swallow, the process becomes involuntary through a rhythmic contraction called peristalsis . Occurs when the LES weakens, allowing acid to

Triggered by the act of swallowing, this wave of contraction pushes the food bolus downward. Occurs when the LES weakens

The outer layer of connective tissue that anchors the esophagus to surrounding structures in the chest. 2. The Gatekeepers: Upper and Lower Sphincters

This remains closed during breathing to prevent air from entering the stomach and opens specifically during swallowing.