PNS or Peripheral Nervous System refers to all the nerves that are located outside of the brain and spinal cord. Synonyms for PNS include the autonomic nervous system, somatic nervous system, and peripheral nerves. The somatic nervous system controls voluntary movements, while the autonomic nervous system controls involuntary actions such as heart rate and digestion. The peripheral nerves are responsible for transmitting information between the central nervous system and other parts of the body. Other synonyms for PNS include the efferent nerves and afferent nerves, which respectively transmit signals from the brain to the organs and send sensory information from the body to the brain.