The primary function of the heart is to pump blood throughout the body. It is a vital organ that works tirelessly to circulate oxygen-rich blood to tissues and organs while also transporting carbon dioxide and other waste products to be expelled. The heart consists of four chambers: two atria and two ventricles. It operates through a rhythmic contraction and relaxation cycle, known as the cardiac cycle. This process ensures that nutrients and oxygen reach cells while contributing to maintaining stable blood pressure. The heart's health is essential for overall well-being, as it plays a crucial role in the circulatory system.