1. Peripheral Nervous System (PNS)

2. PNS  Cranial nerves (12 pairs)  Spinal Nerves (31 pairs)

3. Ganglia  Group of cell bodies in PNS.

4.  TYPES OF NERVES

5. SENSORY  Towards CNS, Afferent nerve.  (From receptors towards brain/spine)

6. MOTOR  AWAY FROM CNS, efferent nerve  From brain/spine to effectors (muscles)

7. MIXED  Sensory and motor neurons.

8. SPINAL NERVES  31 pairs. All mixed out of spinal cord, branches come out through holes in vertebrate.

9. SPINAL NERVES  COLOR CODE Cross section a-j.

10. Page 238  A. Spine  B. Gray Matter  C. White Matter  D. Spinal Nerve  E. Dorsal Root  G. Dorsal Root ganglion  J. Ventral Root.

11. REFLEX ARC  Response between PNS and spinal cord  Quick, involuntary response

13. MONOSYNAPTIC  One synapse  2 nerves = 1 sensory + 1 motor

14. Multisyanptic  MANY SYNAPSES  Multiple neurons