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 in Children: What to Do. A child is constipated if it hurts to pass a bowel movement. While it may be normal for many children to go two to three days without a bowel movement, going four or more days can be considered constipation, even though this may cause no pain in some children and even be normal for a few children. (Note: Large bowel movements are not necessarily constipation.)