After teaching a group of students about the various organs of the upper gastrointestinal tract and possible disorders, the instructor determines that the teaching was successful when the students identify which of the following structures as possibly being affected?
1. Liver
2. Stomach
3. Large Intestine
4. Ileum

Stomach

Explanation:

The gastrointestinal track of the body consists of the  mouth, pharynx, stomach, oesophagus and duodenum.

The exact separation of the upper and lower part of the gastrointestinal takes place  by suspensory muscle of the duodenum.

The area affected will be stomach out of liver, large intestine and ileum. The gastrointestinal in the human beings helps in intaking the food, breaking the food to get energy and excrete the waste out of your body.