The Peripheral nervous system , or PNS , is part of the nervous system , and consists of the nerves and neurons that are outside the central nervous system ( the brain and spinal cord ) and serve the limbs and organs , for example . The peripheral nervous system , or PNS , consists of the nerves and ganglia outside of the brain and spinal cord . The main function of the PNS is to connect the central nervous system ( CNS ) to the limbs and organs .