the enteric nervous system is part of the peripheral nervous system and is found in the
Enteric nervous system The enteric nervous system in humans consists of some 500 million neurons[6] (including the various types of Dogiel cells),[1][7] one two-hundredth of the number of neurons in the brain, five times as many as the one hundred million neurons in the human spinal cord,[8] and about 2/3 as many as in the whole nervous system of a cat. The enteric nervous system is embedded in the lining of the gastrointestinal system, beginning in the esophagus and extending down to the anus.[8]