And because they can easily expand, that decreases our pressure within the veins. On top of that, what also decreases is our flow, the velocity with which our blood actually flows. And on top of that, because veins have to move that blood against the force of gravity that will additionally decrease the flow velocity of our blood within veins. So that's exactly why within veins we also have a low pressure and we also have a low velocity with which our blood actually moves. Now of course we have things like the valve system inside the vein and the skeletal muscle that allow that movement to actually take place. But that's a different story.