The inner space of the GI tract lined with mucosal cells is referred to as the:
A) villi.
B) microvilli.
C) epithelial tissue.
D) sphincter.
E) lumen.

Question

Quizplus · Accepted Answer

The inner space of the GI tract lined with mucosal cells is referred to as the lumen. The villi and microvilli are substructures within the mucosal lining, while the epithelial tissue refers to the type of tissue that makes up the mucosal lining. Sphincters are muscular valves located at various points along the GI tract that help control the movement of material through the system.

The Inner Space of the GI Tract Lined with Mucosal