The primary purpose of the heart is to pump blood throughout the body, supplying oxygen and nutrients to tissues while removing carbon dioxide and waste products. It plays a crucial role in the circulatory system, maintaining blood pressure and ensuring that all body tissues receive adequate blood flow. The heart consists of four chambers: two atria and two ventricles. Its rhythmic contractions are regulated by electrical impulses, ensuring efficient movement of blood. Overall, the heart is vital for sustaining life and enabling the function of other organ systems.