In this video, Dr Mike explains how the gastrointestinal tract (digestive system) controls the movement of food. He explains the role of the enteric nervous system, specifically the myenteric plexus and the role of important neurotransmitters and hormones like Acetylcholine (ACh), Nitric Oxide (NO), Vasoactive Intestinal Peptide (VIP), Gastrin, and Motilin.