MICROANATOMY

Detailed explanation-1: -To accomplish this, the structure of cardiac muscle has distinct features that allow it to contract in a coordinated fashion and resist fatigue. The individual cardiac muscle cell (cardiomyocyte) is a tubular structure composed of chains of myofibrils, which are rod-like units within the cell.

Detailed explanation-2: -The cardiac muscle tissue is separated from the blood and other organs by these inner and outer layers of the heart. Because cardiac muscle has more mitochondria than skeletal muscle, it is resistant to fatigue.

Detailed explanation-3: -Cardiac muscle, also called the myocardium, is one of three major categories of muscles found within the human body, along with smooth muscle and skeletal muscle. Cardiac muscle, like skeletal muscle, is made up of sarcomeres that allow for contractility.

Detailed explanation-4: -Cardiac muscle is an involuntary striated muscle tissue found only in the heart and is responsible for the ability of the heart to pump blood.

Detailed explanation-5: -The specific resistance of cardiac muscle (268 ohm-cm.) is about double that of skeletal (133 ohm-cm.) or smooth (118 ohm-cm.) muscles.