Answer:
It stands for our Central Nervous System and Peripheral Nervous System.
Explanation:
The Human Nervous System is composed of 2 divisions, namely the central nervous system (CNS) and the peripheral nervous system (PNS).
Central Nervous System (CNS)
-- the CNS is made up of our brain and the spinal cord.
--It processes all incoming messages in the body.
Peripheral Nervous System (PNS)
-- the PNS arises from 12 pairs of nerves originating from the brain called the cranial nerves. The 12 pairs of cranial nerves are associated with motor and sensory functions
--31 pairs of spinal nerves supply the communication links between the CNS and the neck,trunk,arms, and legs.
