Answer: The nervous system uses tiny cells called neurons to send messages back and forth from the brain, through the spinal cord, to all the nerves throughout the body. Billions of neurons work together to create a communication network. Different neurons have different jobs.
Explanation:
Neurons are the fundamental units of the brain and nervous system, the cells responsible for receiving sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.