| A | B |
|---|
| Sympathetic division | Efferent portion of the autonomic nervous system |
| Spinal nerve | one of the 31 pairs of nerves connected to the spinal cord |
| Reflex | action resulting from anerve signal passing over a reflex arc |
| Ramus | Branch of spinal nerve |
| Plexus | network of interwoven nerves |
| Mixed nerve | nerves containing axons of sensory and motor neurons |
| Ganglion | cluster of nerve cell bodies outside of the central nervous system |
| Dermatome | Skin surface area supplied by sensory fibers |
