List the four basic layers (tunics) of the digestive tract. Tell the general function of each layer. Describe the interactions within the enteric nervous system that provide local neuronal control of the digestive system. Explain how the central nervous system interacts with the enteric system and the consequence of the interactions. Describe these structures associated with the stomach: muscularis, rugae, and pyloric sphincter. .

1. List the four basic layers (tunics) of the digestive tract. Tell the general function of each layer.
Describe the interactions within the enteric nervous system that provide local neuronal control of
the digestive system. Explain how the central nervous system interacts with the enteric system
and the consequence of the interactions. Describe these structures associated with the stomach:
muscularis, rugae, and pyloric sphincter.