The outer layer of connective tissue that anchors the esophagus to surrounding structures in the chest. 2. The Gatekeepers: Upper and Lower Sphincters
While gravity helps, peristalsis is so powerful that humans can technically swallow and move food to the stomach even while hanging upside down. 4. Clinical Significance: When the System Fails
The primary function of the esophagus is . Once you swallow, the process becomes involuntary through a rhythmic contraction called peristalsis . Gastrointestinal Anatomy and Physiology: The Es...
Triggered by the act of swallowing, this wave of contraction pushes the food bolus downward.
This remains closed during breathing to prevent air from entering the stomach and opens specifically during swallowing. The outer layer of connective tissue that anchors
A result of chronic acid exposure where the squamous cells change into columnar cells (similar to the stomach), increasing the risk of cancer. Conclusion
Occurs when the LES weakens, allowing acid to damage the esophageal lining. Triggered by the act of swallowing, this wave
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
