astrocyte or astroglia glial cell neurology graphic

radial protoplasmic fibrous macroglial cells endfoot processes glial fibrillary acidic protein gfap synaptic cleft synapses brain signaling nucleus filaments cerebral blood flow extracellular ion balance barrier biochemistry vessel cellular neurobiology neurology publication figure presentation slide education educational graphic vector glial glia dendrite cns central cell body brain blood biology axon astroglia astrocyte anatomy