Glial Cells

The glial cells form the supporting tissue of the nervous system and are involved in the (saltatory) propagation of excitation. Glial cells are significantly more numerous than neurons: They represent almost 90% of all cells of the CNS. Glial cells perform very different functions and therefore differ considerably in their morphology. We distinguish the glial cells of the peripheral nervous system (Schwann cells) from the glial cells of the central nervous system. In the CNS there are the macroglia (these are the astrocytes and the oligodendrocytes), the microglia (these are the Hortega cells) and finally the ependym cells.

• Die Schwann-Zellen bilden die Myelinscheiden im PNS und
• die Oligodendrozyten diejenige im ZNS.
• Die Astrozyten sind an der Ausbildung der Blut-Hirn-Schranke beteiligt,
• die Ependymzellen kleiden die Hirnkammern aus und
• die Hortegazellen sind Phagozyten des Gehirns.

https://de.wikipedia.org/wiki/Gliazelle _{(Wikipedia CC-by-sa-3.0)}