Digestive System Liver: The largest organ inside the body. Gallbladder: Stores the bile made in the liver. Large Intestine: It absorbs water and sodium from stool. Esophagus: Carries food from the mouth to the stomach. Stomach: The organ where digestion of protein begins. Pancrease: A gland that makes enzymes for digestion. Small Intestine: The organ where most digestion occurs. Rectum: The lower end of the large intestine, leading to the anus. Anus: The opening at the end of the digestive tract.