What Tissue Lines Most Exchange Surfaces of Multicellular Animals

Question

What tissue lines most exchange surfaces of multicellular animals?
A) connective tissue
B) smooth muscle
C) neural tissue
D) epithelial tissue

Accepted Answer

Epithelial tissue lines most exchange surfaces of multicellular animals, including the skin and the linings of the digestive and respiratory systems, serving as a barrier and interface for absorption and secretion.