Name the muscle layer of heart wall?

The three muscle layers of the heart wall are:

1. Epicardium: The outermost layer of the heart wall, composed of serous connective tissue.

2. Myocardium: The middle layer of the heart wall, composed of cardiac muscle fibers (myocytes).

3. Endocardium: The innermost layer of the heart wall, composed of endothelial cells and connective tissue.