After the arteries deliver fortified blood to the cells throughout the body, the cells take the nutrition and oxygen they need – and then the “used” blood goes back to the heart through the veins. Because the veins are so far away from the heart, they need help in pushing the blood in the right direction; for this purpose, veins have one-way valves that prevent backflow. If any of these tiny valves in a vein doesn’t work properly, the resulting venous insufficiency can cause blood to pool in ... [Read More]