<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The enteric nervous system (ENS) or intrinsic nervous system is one of the main divisions of the nervous system and consists of a mesh - like system of neurons that governs the function of the gastrointestinal tract . It is now usually referred to as separate from the autonomic nervous system since it has its own independent reflex activity . The ENS is also called the second brain . </P> <P> It is derived from neural crest cells . </P>

Is the enteric nervous system part of the autonomic nervous system