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.
What Causes Constipation? Constipation has many possible causes. This can make it difficult to find out whatâs causing your particular case of it. The cause can be as simple and easily fixed as a poor diet or as serious as colon cancer. More benign causes of constipation include a low-fiber diet, poor hydration, and a lack of regular exercise. Sedatives and medications that lower blood pressure may also cause constipation. Underlying medical conditions can also cause constipation.