Question

Select all the are tunics of the GI tract."

a) peritoneum
b) submucosa
c) mucosa
d) adventitia
e) muscularis
f) visceral layer

Answer 1

The tunics of the GI tract are mucosa, submucosa, muscularis, and serosa.

Step-by-step explanation:

The tunics of the GI tract are mucosa, submucosa, muscularis, and serosa. The mucosa is the innermost layer that surrounds the lumen and consists mainly of epithelium that secretes and absorbs substances. The submucosa is a layer of dense connective tissue that connects the mucosa to the muscularis.

The muscularis is composed of circular and longitudinal smooth muscle fibers that help in the movement of food along the digestive tract. Lastly, the serosa is the outermost layer that consists of connective tissue and separates the organs from surrounding cavities and tissues.