Arteries and Veins

The circulatory system is comprised of arteries and veins. Arteries carry oxygen-rich blood, pumped by the heart, throughout the body. The veins are responsible for carrying the deoxygenated blood (and some waste) back to the lungs and heart for re-circulation. The combined action of the foot and calf muscle act as a pump to aid in this upward flow against the pull of gravity.