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.
Constipation symptoms include: Hard, compacted poo that is difficult or painful to pass. Straining during bowel movements. No bowel movements after 3 days. Stomach aches that are relieved by bowel movements. Bloody stools due to hard poo, piles (haemorrhoids) and anal fissures.