The correct order for the layers of the GI tract wall,from innermost (next to lumen)to outermost is
A)mucosa - submucosa - adventitia/serosa - muscularis.
B)muscularis - mucosa - adventitia/serosa - submucosa.
C)adventitia/serosa - mucosa - submucosa - muscularis.
D)mucosa - submucosa - muscularis - adventitia/serosa.
E)adventitia/serosa - muscularis - mucosa - submucosa.

Question

Quizplus · Accepted Answer

The correct order for the layers of the GI tract wall, from innermost (next to lumen) to outermost, is mucosa - submucosa - muscularis - adventitia/serosa. The mucosa layer lines the lumen and is in contact with food, while the submucosa contains blood vessels, nerves, and glands. The muscularis layer is responsible for the movement of food, and the outermost layer is either the adventitia (in the esophagus) or serosa (in the rest of the GI tract), which provides structural support.

The Correct Order for the Layers of the GI Tract