Autonomic Nervous System

The sympathetic nervous system (SNS) and parasympathetic nervous system (PNS) are two vital divisions of the autonomic nervous system (ANS). These play a role in the involuntary processes of the body with the exception of breathing which is controlled by the autonomic nervous system as well as with conscious effort.

The diagram below shows how the position of the autonomic nervous system in the complete system of nerves that runs our survival.