The interstitial cells of the nervous system.
D001812:Blood-Brain Barrier; D006801:Humans; D009186:Myelin Sheath; D009413:Nerve Fibers, Myelinated / Q000166:cytology; D009417:Nerve Tissue / Q000166:cytology; D009457:Neuroglia / Q000166:cytology / Q000378:metabolism / Q000502:physiology; D012583:Schwann Cells; D012835:Silver Nitrate
D012835:Silver Nitrate