Question

A single layer of cells that composes epicardium is called ...............

• A. endothelium
• B. mesothelium
• C. ependyma
• D. epidermis

Hint:

Mesothelium is the tissue that forms the epicardium, the outer layer of the heart, as well as the lining of body cavities.

Answer 1

The Correct Option is B

Step 1: Understanding the structure of the epicardium.
The epicardium is the outer layer of the heart wall. It is composed of mesothelium, which is a single layer of flat cells.
Step 2: Analyzing the options.
(A) endothelium: Incorrect. Endothelium lines blood vessels, not the heart.
(B) mesothelium: Correct. Mesothelium is the tissue that forms the epicardium of the heart.
(C) ependyma: Incorrect. Ependyma lines the ventricles of the brain and spinal cord, not the heart.
(D) epidermis: Incorrect. Epidermis is the outer layer of skin, not related to the heart's epicardium.
Step 3: Conclusion.
The correct answer is (B) mesothelium, as it is the tissue layer that forms the epicardium.