| A | B |
|---|
| Axion Hillock | All or none principle |
| Axon | carries the action potential away from the cell body |
| Axon Branches | The branches carry the message down to the bouton |
| Boutons | Releases the neurotransmitter that will stimulate the next neuron or muscle |
| Synaptic Vesicles | Small vacuoles that contain neurotransmitters |
| Synaptic Cleft or Synapse | The space between neuron and muscle |
| Glia or Neuroglia | These cells do not transmit impulses |
| Oligodendrocytes | Reaches out and insulates a portion of the dendrite/axon process |
| Schwann | Myelin sheath |
| neurilemma | allows the PNS neurons the ability to repair themselves |
| Astocytes | Feeds the neuron |
| Microglia | Keeps the CNS clean |
