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.
A change in your diet, poor nutritional habits, stress, dehydration or lack of physical activity can also cause constipation. Physicians generally recommend that if you have constipation for more than two weeks, you should see your doctor so a cause can be determined.