The is part of the central nervous system (CNS) and the is part of the peripheral nervous system (PNS). The is part of the central nervous system (CNS) and the is part of the peripheral nervous system (PNS). brain; spinal cord cranial nerve; spinal nerve spinal nerve; spinal cord spinal cord; spinal nerve.

Explanation:

The nervous system divide into two main subdivisions:

i) the central nervous system and  

ii) the peripheral nervous system

1. The CNS is comprised of the brain and spinal cord means the brain and spinal cord make up the central nervous system.  

2  The Peripheral Nervous System(PNS) contains only nerves (like spinal nerve),  

It further divides into somatic and autonomic nervous systems.

it would be heredity