This Tunic of the GI Tract is Important for Secretion

Question

This tunic of the GI tract is important for secretion of enzymes and absorption of nutrients.
A) muscularis externa
B) serosa
C) mucosa
D) submucosa

Accepted Answer

The mucosa is the innermost layer of the gastrointestinal tract, which is directly involved in the secretion of enzymes necessary for digestion and the absorption of nutrients into the bloodstream.