Figure 1. Schematic depiction of the intestine showing the general arrangement of the enteric nervous system in the gut wall.

Enteric neurons and glia are housed within the submucosal and myenteric plexuses. Neural programmes in the submucosal plexus regulate fluid exchange across the intestinal mucosa and neural programmes in the myenteric plexus coordinate the contractile activity of the intestine. Image courtesy of David E. Fried.