NEET BIOLOGY

Detailed explanation-1: -Cardiac muscle makes up the thick middle layer of the heart and is surrounded by a thin outer layer called the epicardium or visceral pericardium and an inner endocardium.

Detailed explanation-2: -The muscle layer of the heart is termed the myocardium and is made up of cardiomyocytes. The myocardium is found in the walls of all four chambers of the heart, though it is thicker in the ventricles and thinner in the atria.

Detailed explanation-3: -Skeletal muscles are attached to bones and they contract to move the body. Cardiac muscles are found in the heart and they contract to pump blood. Skeletal muscle fibers are long and thin. Cardiac muscle fibers are thicker.