Which statement best describes the relationship between the central nervous system and the peripheral nervous system?
1) The central nervous system consists of the brain and spinal cord, while the peripheral nervous system includes all the nerves outside of the central nervous system.
2) The central nervous system includes all the nerves outside of the brain and spinal cord, while the peripheral nervous system consists of the brain and spinal cord.
3) The central nervous system and the peripheral nervous system are two separate systems that do not interact with each other.
4) The central nervous system and the peripheral nervous system have the same functions and structures.
