THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Three layers of tissue form the heart wall. The outer layer of the heart wall is the epicardium, the middle layer is the myocardium, and the inner layer is the endocardium.

Detailed explanation-2: -Cardiac muscle (or myocardium) makes up the thick middle layer of the heart. It is one of three types of muscle in the body, along with skeletal and smooth muscle.

Detailed explanation-3: -The wall of the heart separates into the following layers: epicardium, myocardium, and endocardium. These three layers of the heart are embryologically equivalent to the three layers of blood vessels: tunica adventitia, tunica media, and tunica intima, respectively.

Detailed explanation-4: -The heart wall is comprised of three layers. The endocardium is the innermost layer, and the muscular middle layer is the myocardium. The epicardium is the outermost layer of the heart wall, and also the innermost layer of the protective pericardium that surround the heart.