Glear is a, let's keep talking centrally. So we sait all agot ange sits are centrally ependimal cells. And that again, into our research, which we're looking at using those cells in spotocold injury. But where is this? As in the ventricles, right? Ventricles, but also the aqueducts and so forth. The way i teach my students, as you may get a afo piece of paper, and you roll it up, and you look through it. All those colod out portions and so lining that are the ependimal Cells.