Nervous  At the center of the nervous system is the brain whichsends and receives messages through a network of nerves. The spinal cord is a thick bundle of nerves which runs down the center of the spine. Along the spinal cord smaller bunches of nerves branch out. From these bundles, smaller bundles of nerves branch out again. This network of nerves allows the brain to communicate with every part of the body. Nerves transmit information as electrical impulses from one area of the body to another. S