o Secretion of digestive glands k Main functions of digestive fluids o Gastrointestinal innervation k Intrinsic (or enteric) nervous system Submucosal myenteric plexus k Extrinsic nervous system Parasympathetic sympathetic nerves o Gastrointestinal hormones 米 General functions 米 Brain- gut peptides• Secretion of digestive glands * Main functions of digestive fluids • Gastrointestinal innervation * Intrinsic (or enteric) nervous system Submucosal & myenteric plexus * Extrinsic nervous system Parasympathetic & sympathetic nerves • Gastrointestinal hormones * General functions * Brain-gut peptides