Athros chlorosis is occurring in arteries, predominantly in the larger arteries. It's a bit like if you had a fast running creek or river, and it's got no impediments in it, but then if you put a whole lot of rocks in the middle of it, it smashes into the rocks and then causes turbulence. That's what kind of happens in your heres, the rotteds. But before we jump on to that, should we talk about the layers of the blood vessels? I think you do that quickly a case. So where to sin? Arteries. When you think about blood vessels, they've all got three layers, regardless of its being