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.
See, if meat stays in the colon for up to six months, then so will everything behind it. And a six-month long bout of constipation is unheard of (at least by me). Then, of course, there are all these sphincters throughout the digestive tract which prevent back-flow of materials.