The nervous system is one of the organ systems in the body made of organs such as the brain, sensory organs, spinal cords, effector organs, etc.
It is divided into the central nervous system and the peripheral nervous system.
The central nervous system is made up of the spinal cord and the brain, while the peripheral nervous systems are made up of the cranial nerves and other nerves in the body.
The peripheral nervous system serves to connect the brain and the spinal cord to the receptor organs such as skin and effector organs such as glands and muscles.