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.
It depends on what you eat. Fats and proteins take longer to digest than carbohydrates. Additionally, the amount of time food spends in the stomach, small intestine, & large intestine varies from person to person. However, it generally takes 12-16 hours; therefore, if you don't have a BM every day you are constipated.our body evacuates the bowel to make room for the food that is in the process of traveling down. Therefore, that individual is expelling the meal he or she ate 12-16 hours ago.