The muscle tissue of the heart composed of striated, involuntary muscle known as cardiac muscle.
The thick, muscular layer forming the heart wall.
The middle layer of the heart, consisting of the cardiac muscle.
The middle layer of the wall of the heart, formed of heart muscle.
Thick, muscular middle layer of the heart wall, composed almost entirely of cardiac muscle (the other layers being the outer epicardium and inner endocardium).
The middle of the three layers forming the wall of the heart. It is composed of cardiac muscle and forms the greater part of the heart wall, being thicker in the ventricles than in the atria.
The middle layer of the walls of the heart, composed of cardiac muscle. The layers of cardiac muscle form a complex spiral. When they contract they twist or wring blood from the ventricles. The muscle layers are attached to an internal “skeleton” of the heart composed of dense connective tissue.
The myocardium, which constitutes the major portion of the heart wall, is a thick middle layer responsible for contracting during each heartbeat.
The second layer among the three muscle layers forming the heart wall is known as the myocardium. It consists of cardiac muscle tissue.