The specific function of the cardiac muscle is to pump blood throughout the body by rhythmic and coordinated contractions. This pumping action delivers oxygen and nutrients to cells and removes waste materials. Cardiac muscle, found only in the heart and called the myocardium, contracts involuntarily and continuously without fatigue. Its cells are connected by intercalated discs that help transmit electrical impulses for synchronized contractions, enabling the heart to function efficiently as a pump. During each heartbeat, the cardiac muscle goes through systole (contraction phase) to push blood out of the heart chambers and diastole (relaxation phase) to allow the chambers to refill with blood. These contractions and relaxations ensure a continuous flow of blood in the circulatory system. The cardiac muscle is essential for sustaining life as it maintains the blood circulation that supports all body tissues. In summary, the cardiac muscle's core function is to maintain a constant, rhythmic pumping of blood, essential for delivering oxygen and nutrients and removing waste products from the body cells. This involuntary and highly coordinated action distinguishes it from other muscle types in the body.