While Explaining to a Group of Nursing Students What the Function

While explaining to a group of nursing students what the function of the first mucosal layer of the lower two thirds of the esophagus, the pathophysiology instructor mentions which of the following functions? Select all that apply.

A) Secretion of mucus to lubricate and protect the inner surface of the alimentary canal
B) Smooth muscle cells that facilitate movement of contents of the GI tract
C) Holding the organs in place and storage of fats
D) Barrier to prevent the entry of pathogenic organisms
E) A cushioning to protect against injury from sports or car accidents