The organ responsible for pumping blood throughout the body is the heart. This vital muscular organ functions as part of the circulatory system, ensuring that oxygen-rich blood is delivered to various tissues and organs while also facilitating the removal of carbon dioxide and waste products. The human heart has four chambers: the right and left atria and the right and left ventricles. It operates through a rhythmic contraction and relaxation cycle, known as a heartbeat, regulated by electrical impulses. The heart's health is crucial for overall well-being, making it a focal point in medical discussions.