CNS central nervous system
- spinal cord
PNS peripheral nervous system
consists of 2 types of nerves.
autonomic nervous system
division of the peripheral nervous system that controls involuntary motor functions and affects such things as digestion and heart rate.
sympathetic nervous system
fight or flight response. This system is engaged when the body is in crisis.
parasympathetic
Engaged in times of relaxation and is referred to as the feed or breed response.