The layer of the alimentary tube that is responsible for peristalsis is the:
A)mucosa
B)submucosa
C)external muscle layer
D)mesentery

Question

Quizplus · Accepted Answer

The external muscle layer of the alimentary tube contains both circular and longitudinal smooth muscle fibers. These fibers work together to create peristalsis, which is the coordinated contraction and relaxation of the muscles that pushes food along the digestive tract. The mucosa layer contains epithelial cells and secretory cells that produce digestive enzymes and mucus, and the submucosa layer contains blood vessels and nerves, but neither of these layers are responsible for peristalsis. The mesentery is a membrane that attaches the intestines to the abdominal wall and contains blood vessels, nerves, and lymphatic vessels, but it does not play a direct role in peristalsis.

The Layer of the Alimentary Tube That Is Responsible for Peristalsis