•The brain and spinal cord together make the central nervous system (CNS).
•Cranial nerves grow from the brain and spinal nerves grow from the spinal cord that run everywhere in the body to make the body's neural network and control the entire body.
•Cranial and spinal nerves along with their branches make the peripheral nervous system (PNS).
•The brain acts as the control and command centre that receives all the sensory information from all over the body and sends out commands to the relevant parts of the body
•The spinal cord acts as the main conduit that carries all this information to and fro, between the brain and the rest of the body.