Natural Care For Varicose Veins By Dr. Rita Louise Our circulatory system is made up of a complex web of arteries and veins. Our arteries carry oxygen rich blood to the cells of our bodies, while the veins are designed to pump oxygen poor blood back to the heart. This is accomplished through a series of one-way valves that do not allow blood to flow backwards into the vein. When someone suffers from varicose veins, the one-way valves of their veins do not close adequately, resulting in the ine.