They have the tunica intima, the tunica media and the tunica extrema. However, veins have a much thinner, they have a relatively thin tunica media layer and that's because they have very few smooth muscles. So this layer here inside veins is relatively thick. 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.