Functions of gastrointestinal system Movement: propels food through the digestive system Secretion release of digestive juices in response to a specific stimulus Digestion breakdown of food into molecular components small enough to cross the plasma membrane Absorption passage of the molecules into the body,'s interior and their passage throughout the bod Elimination: removal of undigested food and wastesFunctions of gastrointestinal system ◼ Movement: propels food through the digestive system ◼ Secretion: release of digestive juices in response to a specific stimulus ◼ Digestion: breakdown of food into molecular components small enough to cross the plasma membrane ◼ Absorption: passage of the molecules into the body's interior and their passage throughout the body ◼ Elimination: removal of undigested food and wastes