Final answer:
The GI tract organs include the large intestine and esophagus, as well as other organs through which food passes directly. The pancreas and liver are accessory organs that aid digestion by producing necessary chemicals but are not part of the GI tract.
Step-by-step explanation:
The organs of the GI tract are specifically those through which food passes directly during the process of digestion. These include the large intestine and esophagus, as well as the mouth, pharynx, stomach, and small intestine. The pancreas and liver, while important to the digestive process as accessory organs, are not considered part of the GI tract itself because food does not pass through them. Instead, they contribute chemicals like enzymes and bile that aid digestion. The pancreas produces digestive enzymes and bicarbonate to neutralize stomach acid entering the small intestine, while the liver produces bile stored in the gallbladder to emulsify fats. Both organs assist in the chemical breakdown of food substances.