Which of the following describes the primary function of the heart?

The primary function of the heart is to pump blood through the body, which includes distributing both oxygenated and deoxygenated blood as part of the circulatory system. The heart's role is vital in ensuring that all parts of the body receive the necessary oxygen and nutrients delivered by the blood, while also facilitating the removal of carbon dioxide and other metabolic waste products.

This process is carried out through two primary circuits: the pulmonary circuit, where the heart pumps deoxygenated blood to the lungs for oxygenation, and the systemic circuit, where oxygenated blood is distributed to the rest of the body. By continually pumping blood, the heart maintains circulation and supports organ function, which is essential for survival. The heart's dual action demonstrates why it is important to recognize its complete role in the circulation process rather than limiting its function to just one type of blood or one destination.