GROSS ANATOMY

Detailed explanation-1: -The middle layer of the heart wall is the myocardium; this is the actual muscular layer of the heart responsible for contracting and pumping blood throughout your body. The endocardium is the thin innermost layer of tissue that makes direct contact with the blood pumping through the heart chambers.

Detailed explanation-2: -Myocardium – a thick, muscular middle layer that contracts and relaxes to pump blood around of your heart.

Detailed explanation-3: -The myocardium is the middle muscular layer of the heart. It is the thickest layer which lies between the single-cell endocardium layer, and the outer epicardium, which makes up the visceral pericardium that surrounds and protects the heart. The myocardium is composed of specialized muscle cells called cardiomyocytes.

Detailed explanation-4: -Cardiac muscle tissue, or myocardium, contains cells that expand and contract in response to electrical impulses from the nervous system. These cardiac cells work together to produce the rhythmic, wave-like contractions that is the heartbeat.

Detailed explanation-5: -The epicardium is the outer layer that contains blood vessels. The myocardium is the middle layer that is composed of contractile tissues. The endocardium is the innermost layer and composes the valves, inner lining of the chambers, and contains vessels and nerves.