The cardiac system, also known as the circulatory system, is responsible for transporting blood throughout the body. It consists of the heart, blood vessels, and blood. The heart pumps oxygen-rich blood to the organs and tissues while returning oxygen-poor blood to the lungs for reoxygenation. The system plays a crucial role in maintaining overall health by delivering essential nutrients and removing waste products. The major components include arteries, which carry blood away from the heart, and veins, which return blood to the heart. Proper functioning of the cardiac system is vital for sustaining life and supporting bodily functions.