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.
Why Fiber Helps When You Have Constipation. 1  Soluble fiber absorbs water and binds with fatty acids, forming a gel-like substance that keeps stools soft. 2  Insoluble fiber does not dissolve in water, thus providing bulk and moisture to the stool. 3  Both types of fiber are good for constipation.