Peace Love Venipuncture shirt
A vein may have a diameter from 1 millimeter to 1-1.5 cm. The smallest veins receive blood from arteries through arterioles and capillaries. The veins branch into the larger veins that eventually carry blood to the largest vein in the body, the aorta. The blood is then transported from the superior vena cava and the inferior vena cava to the right atrium of the heart.