The primary role of the heart in the human body is to pump blood throughout the circulatory system, ensuring that oxygen and nutrients are delivered to tissues while removing carbon dioxide and metabolic waste. The heart works through a complex system of contractions coordinated by electrical signals. It consists of four chambers: the right and left atria and the right and left ventricles. The right side pumps deoxygenated blood to the lungs for oxygenation, while the left side pumps oxygen-rich blood to the rest of the body. Proper heart function is vital for maintaining overall health and supporting bodily systems.