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.
Undoubtedly, they face something worse than constipation and need to call your doctor first because of vomiting constipation is not a normal condition. Constipation is the only condition that causes hardening of the stool, which is very difficult to pass and may take two or three weeks to return to normal.