The peripheral nervous system is all of the nervous system that is not the central nervous system (brain and spinal cord). Anatomically, this includes cranial and spinal nerves projecting to and from the central nervous system, as well as ganglia (collections of cell-bodies) and sensory receptors. In terms of both general function and anatomy, the peripheral nervous system is commonly divided into the somatic, autonomic and enteric nervous systems. The enteric nervous system controls gastrointestinal function.