cranial nerves spinal nerves functions of nervous system somatic autonomic sensory nerve motor nerve receptor effector

1. CNS = brain and spinal cord ~90% (90 Billion) of all neurons in body are in CNS
PNS = Cranial nerves and spinal nerves, nerve plexuses & ganglia ~10% (10 Billion)
of all neurons in body are in PNS

3. PNS is our link to the outside world
Without it CNS is useless
Proof:
Sensory deprivation->hallucination, illusion, and
delusion

8. Some
Say
Marry
Money
But
My
Bro
Says
Big
Brains
Matter
Most
Only
One
Of
The
Two
Athletes
Felt
Very
Good,
Victorious
And
Healthy

9. I’m the
longest
I’m the
shortest
I’m the
biggest and
thickest

19. Reflex arc

20. Eye- sensory
receptor
Leg muscles-
effectors

29. Autonomic

30. Somatic