Close examination of an organ reveals a lining of several layers of cells.The layers do not contain any blood vessels, and one surface of the cells faces the internal cavity of the organ.This tissue is probably
A) epithelium.
B) muscle tissue.
C) connective tissue.
D) neural tissue.
E) fat tissue.

Question

Quizplus · Accepted Answer

The presence of several layers of cells and the fact that one surface faces the internal cavity of the organ suggests that this tissue is an epithelium. Epithelial tissues in general have the characteristic of being layers of cells that form a barrier between two compartments (in this case, the internal cavity of the organ and the outside environment). Epithelial tissues are typically avascular, meaning they do not contain blood vessels, but receive nutrients via diffusion from underlying tissues.

Close Examination of an Organ Reveals a Lining of Several