So that's exactly why, unlike our arteries, the veins are not very elastic. In fact, we can assume they're inelastic. And that means they do not recoil the same way that our arteries recoil. And that's exactly why when the blood flows through our vein, when it expands, it remains in that shape because it doesn't have all of that smooth muscle to recoil it back into place. So that's exactly why, unlike the arteries, these don't actually have such a high resistance, and they can expand and carry much more blood, much more volume of blood than our arteries. In fact, the veins together carry about 60% to 65% of the total volume of blood.