What is the role of the heart in the human body?

The heart is the central organ of the circulatory system, responsible for pumping blood throughout the body. It supplies oxygen and nutrients to tissues and removes waste products like carbon dioxide. The heart works by contracting and relaxing in a rhythmic pattern, which creates the heartbeat. Blood circulates through the body in two main loops: the pulmonary circulation, which carries blood to the lungs for oxygenation, and the systemic circulation, which delivers oxygenated blood to the rest of the body. The heart’s ability to maintain blood flow is crucial for sustaining life and supporting overall bodily functions.