Question

During the esophageal phase of deglutition, the bolus is moved toward the stomach by rythmic contractions of the muscularis externa called ___________

Answer 1

During the esophageal phase of deglutition, the bolus is moved toward the stomach by rhythmic contractions of the muscularis externa called peristalsis.

Step-by-step explanation:

During the esophageal phase of deglutition, the bolus is moved toward the stomach by rhythmic contractions of the muscularis externa called peristalsis.

The circular muscle layer of the muscularis contracts to pinch the esophageal wall and force the bolus forward, while the longitudinal muscle layer contracts to shorten the area and push out its walls to receive the bolus.

This series of contractions keeps moving food toward the stomach.