Question

Describe how the muscularis externa varies among the esophagus, stomach, small intestine, and large intestine. List any features of this layer that are unique to each part of the GI tract.

Answer 1

Answer: Therefore, muscularis layer of esophagus has two layers while muscularis layer of stomach has three layers. Therefore, this is the key difference between muscularis layer of esophagus and stomach. Moreover, a part of the muscular layer of upper esophagus is skeletal muscle rather than the smooth muscle. Muscularis layer of the stomach, on the other hand, does not have skeletal muscle

Step-by-step explanation: