The circulatory system consists of one heart, five liters of blood ... receives carbon dioxide-laden blood for oxygenation in the lungs. Blood flows through arteries and veins, with valves ...

Your circulatory system is made up of three parts: the heart, blood vessels and the blood itself. Your heart keeps all the blood in your circulatory system flowing. The blood travels through a ...

Medically reviewed by Susan Russell, MD Your lungs play a vital role in supplying oxygen to your body. When they are healthy, ...