1) Encompasses the mouth, esophagus, stomach, intestines, biliary tract, pancreas, liver, and associated hormones and secretions.

2) The organs that take in food and turn it into products that the body can use to stay healthy. Waste products the body cannot use leave the body through bowel movements. The digestive system includes the salivary glands, mouth, esophagus, stomach, liver, pancreas, gallbladder, small and large intestines, and rectum.