But low compliance means we have to apply a high pressure to expand it even by a tiny amount. Now let's discuss arteries. So let's recall that the structure of arteries consists of three different layers and for arteries, the middle layer known as the tunica media contains a thick layer of smooth muscle. And as a result of this thick layer of smooth muscle it gives arteries the ability to recoil when we actually try to expand them. So what this means is when the blood actually flows through these arteries and when the blood applies a force and a pressure on the walls of those arteries as a result of that smooth muscle the walls can exert a force back on that blood and resist that expansion. So that is what we mean by recoiling back into place.