Enteric nervous system
The enteric nervous system is an interdependent part of the autonomic nervous system. Despite of its many interactions with other parts of the ANS, it can be regarded as a nerval body of its own. Its functioning is still subject to research in neurogastroenterology. It has as much as 1 bilion neurons, 1/10th the number of neurons in the brain.
This article is a stub. You can help Wikipedia by [ expanding it].