How does the muscularis layer of the esophagus differ from the rest of the digestive tract?
A)it is all skeletal muscle
B)the superior part is skeletal muscle
C)the inferior part is skeletal muscle
D)it has alternating smooth and skeletal muscle sections

Question

Quizplus · Accepted Answer

The muscularis layer of the esophagus is unique in that its superior one third is composed of skeletal muscle, while the inferior two thirds are composed of smooth muscle. Therefore, option B is the correct answer.

How Does the Muscularis Layer of the Esophagus Differ from the Rest