Why does the superior part of the esophagus contain skeletal muscle instead of smooth muscle?
A) The first phase of swallowing is under involuntary control.
B) The second phase of swallowing is under voluntary control.
C) The first phase of swallowing is under voluntary control.
D) The second phase of swallowing is under involuntary control.

Question

Quizplus · Accepted Answer

The first phase of swallowing is under voluntary control, allowing us to initiate swallowing consciously. The superior part of the esophagus contains skeletal muscle to facilitate this voluntary action.

Why Does the Superior Part of the Esophagus Contain Skeletal