Chew on this! In Science Comics: The Digestive System, visit the inside of your mouth, stomach, liver, intestines, and other organs that make up the gastrointestinal tract! Your guide to the gut is a friendly bacterium who will take you on a journey beyond imagination. Uncover how food is transformed into nutrients! Explore strange and dangerous glands! Behold the wonders of saliva, mucus, and vomit! This is a trip to the toilet you will never forget!