AUTONOMIC NERVOUS SYSTEM

The nervous system is divided into the

• peripheral nervous system (PNS) and the
• central nervous system (CNS) 

 The PNS consists of

• sensory neurons running from stimulus receptors that inform the CNS of the stimuli
• motor neurons running from the CNS to the muscles and glands - called effectors - that take action.

The CNS consists of the

• spinal cord and the
• brain

 The autonomic nervous system has two subdivisions, the

• sympathetic nervous system and the
• parasympathetic nervous system.

REFERENCE : http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/PNS.html