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.
Check the symptoms. According to the American College of Gastroenterology, you may have chronic constipation if you've experienced some combination of the following symptoms for 3 months or more in the last year: 1  Fewer than 3 bowel movements a week. 2  Difficulty passing stools. 3  Straining. 4  Hard or lumpy stools.