What is autonomic nervous system? Name the subsystems in which it is subdivided

What is autonomic nervous system? Name the subsystems in which it is subdivided.

Autonomic Nervous System: It refers to the system which regulates the activities of visceral organs by regulating the activities of their involuntary muscles and glands. Types : It is divided into 2 sub systems:

  1. Sympathetic nervous system.
  2. Parasympathetic nervous system.