| a Pia mater | b Subarachnoid space filled with cerebral spinal fluid, wastes and various cells. | |||
| c Fibrocyte mixed in the blue collagen fibers of the dura mater. | d Nucleus & nucleolus of unipolar neuron | |||
| e Nucleus of one of many tiny satellite cells surrounding the large unipolar neuron. |
f Myelinated axon | |||
| g Node of Ranvier | h Nucleus of white Schwann cell | |||