The organization of neural tissue in the CNS differs significantly from that in the PNS, owing primarily to their distinctive neuroglia populations. The CNS has a greater variety of neuroglia than the PNS has. Although histological descriptions have been available for the past century, the technical problems involved in isolating and manipulating individual glial cells have limited our understanding of their functions. Figure 12-6 summarizes information known about the major neuroglia populations in the CNS and PNS. |
