<prompt> Schwann cells are supporting cells of:CNSPNSANSAll of the above  <response>: B PNS CNSPNS Supportive Cells: Astrocytes--physical support, repair, K metabolism. Microglia--phagocytosis. Oligodendrocytes--central myelin production. Schwann cells--peripheral myelin production. Ependymal cells--inner lining of ventricles. 