Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger,
Peer Review Status: Externally Peer Reviewed
Human, 10% formalin, silver diamminohydroxide, 500 x.
Protoplasmic astrocyte: It is stellate in shape, with many cytoplasmic processes. It is found chiefly in gray matter of brain and spinal cord and is important in metabolite transport.
Nuclear region: Nucleus of the protoplasmic astrocyte is unstained. It is large and rounded or ovoid.
Microglia cell: This is a small, dark cell. Processes fewer than those of the astrocyte, spiny and much more delicate. Microglia become phagocytes when cellular debris is present. Microglia are of mesodermal origin and migrate into the central nervous system and increase in number with nervous system damage.
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