Nerves are waves of electricity to allow communication between the brain and other parts of the body. The brain sends signals to the spinal cord and other parts of the body. (The Essential job of nerve cells is to send and receive messages.) The nervous system (Nerve Cells) · Senses your surroundings inside and out · Communicates information between your brain and spinal cord and other tissues · Coordinates (matches) voluntary movements · Regulates functions like breathing, heart rate, blood pressure and body temperature. (Scroll down)