Mouse-Over the glial cells in the 4 corners

Figure attribution
Glial Composite picture- Artwork by Holly Fischer, CC BY 3.0, via Wikimedia Commons
Ependymal cell- Martin Hasselblatt MD, CC BY-SA 3.0, via Wikimedia Commons
Oligodendrocyte- Oleg Tsupykov, CC BY-SA 4.0, via Wikimedia Commons
Astrocyte- Jeffery J. Iliff, Public domain, via Wikimedia Commons
Microglia- NIH Image Gallery from Bethesda, Maryland, USA, Public domain, via Wikimedia Commons