Question

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

Answer 1

Hint:- The wall of heart consists of three layers. That is Epicardium, Myocardium and Endocardium. These layers together form pericardium. Epicardium is the outer layer of the wall of the heart. Myocardium is in the middle of the heart wall and Endocardium is the inner layer of the heart wall.

Complete step-by-step solution:-
The three layers of heart is given as under
1. Epicardium
2. Myocardium
3. Endocardium
Elaboration of the layers-
1. Epicardium - Epicardium is the external layer of the wall of the heart. The epicardium is the thin, transparent outer layer of the wall And is composed of delicate connective tissue. The epicardium is a thin layer of elastic connective tissue And sad that serves as an additional layer of protection from trauma or friction under the pericardium.
2. Myocardium - Cardiac muscle also called heart muscle or myocardium. It is the middle layer of the wall of the heart. It is one of the three types of vertebrate muscles, with the other two being skeletal and smooth muscles. It is an involuntary, striated muscle that constitutes the main tissue of the wall of the heart..
3. Endocardium - The endocardium is the innermost layer of the tissue that lines the chambers of the heart. Its cells are embryologically and biologically similar to the endothelial cells that line blood vessels. The endocardium also provides protection to the valves and heart chambers. This layer is continuous with the inner lining of blood vessels.
These membranes together make up the pericardium. The serous lining of the pericardial sac is separated from the epicardium on the heart surface by a thin fluid- filled space
Therefore, the wall of the heart has all three layers.
So from above discussion we can conclude that correct answer is option D All of the above

Note:-
The wall of the heart consists of three layers:
- The epicardium (external layer)
- The myocardium (middle layer)
- The endocardium (inner layer).
These membranes together make up the pericardium.