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.
If you had a long labor without food, or had bowel movements during labor, or had an enema, you may suffer from constipation for a day or two. All these conditions make your intestines empty and, therefore, cause constipation. If you had a cesarean section, it might take three to four days for your bowel to function normally. High progesterone levels due to hormonal changes during pregnancy can cause chronic constipation after delivery.