The nervous system uses electrical and chemical signals to communicate between the brain, spinal cord, and body. Neurons are specialized cells that transmit impulses. A message travels along a neuron as an electrical signal and crosses to the next neuron at synapses using neurotransmitters.
The central nervous system (brain and spinal cord) processes information, while the peripheral nervous system carries signals to and from limbs and organs. It controls reflexes, movement, and bodily functions