Question

Heart wall is made up of
A. Myocardium
B. Epicardium
C. Endocardium
D. All of the above

Answer 1

Hint: The wall of the heart comprises three layers of uneven thickness. . The outer layer of the heart wall is also the innermost layer of the pericardium.

Complete Answer:
- The heart is a muscular organ that is almost as big as our fist and is located in the middle of our chest. This hollow organ pumps blood all over the body. In the same time, the heart conducts two pumping tasks.
- The heart pumps oxygen-rich blood to the body and pumps deoxygenated blood to the lungs. The heart is made up of the cardiac muscles. The heart of man is split into four chambers. The two chambers in the upper half of the heart are the right atrium and the left atrium. The other two chambers at the bottom of the heart are the left ventricle and the right ventricle.
- The heart wall comprises three layers of irregular thickness. These are epicardium, myocardium, and endocardium, from surface to deep.
- The epicardium is the thin outer layer of the wall of the heart and is continuous with the serous lining of the fibrous sac that envelops the heart.
- Myocardium is the muscle layer of the heart. It is the thickest layer. Endocardium is a very thin, flat layer of cells that matches a squamous epithelium. This membrane is a line between the inside of the heart. The heart valves are formed by strengthened folds of this material.

Thus, the correct answer is option D i.e., All of the above.

Note: The human heart beats about 70 times a minute. When we touch the inside of our wrist right below our fingertips, we can detect a pulse rising and dropping in the artery of our hand.