Best Answer: The peripheral nervous system, which it is a component of. The sympathetic and parasympathetic systems are components of the autonomic nervous system.
Also, make the call if: 1  Constipation is a new problem for you. 2  You have blood in your stool. 3  You are losing weight even though you are not dieting.  You have severe pain with bowel 1  movements. Your constipation has lasted more than 2 weeks.  You have pencil-thin stools.
Other possible causes of constipation include: 1  a bowel obstruction. 2  bowel disease, such as irritable bowel syndrome. 3  an anal fissure.  colon 1  cancer. rectal cancer.  abdominal cancer that puts pressure on your digestive system.