neuron and glial cells diagram

font line text design cartoon presentation drawing vector slide neuroglial peripheral neurons science background nucleus axon dendrites graphics education brain cell human system medical myelin nervous biology nerve neurology synapse schwann vector receptor structure signal sensory dendrite neural sheath synaptic biological peripheral neurone microglial central nervous neuroglia neuro neurotransmitter oligodendrocytes astrocytes nerve healthcare medicine human microbiology satellite ependymal motor sensory