Autonomic Nerves of Abdominopelvic Organs: Conclusions

The primitive embryonic foregut, midgut and hindgut form the gastrointestinal tract. The foregut extends from the mouth to the proximal two thirds of the duodenum. The midgut extends from the distal one thirds of the duodenum to the proximal two thirds of the transverse colon, while the hindgut extends from the distal one third of the transverse colon to the anus.  The autonomic nervous system with its sympathetic and parasympathetic fibers and their opposing actions control all these organs.