What is (are) Zollinger-Ellison Syndrome ?
The stomach, duodenum, and pancreas are digestive organs that break down food and liquid.
                
- The stomach stores swallowed food and liquid. The muscle action of the lower part of the stomach mixes the food and liquid with digestive juice. Partially digested food and liquid slowly move into the duodenum and are further broken down.  - The duodenum is the first part of the small intestinethe tube-shaped organ between the stomach and the large intestinewhere digestion of the food and liquid continues.  - The pancreas is an organ that makes the hormone insulin and enzymes for digestion. A hormone is a natural chemical produced in one part of the body and released into the blood to trigger or regulate particular functions of the body. Insulin helps cells throughout the body remove glucose, also called sugar, from blood and use it for energy. The pancreas is located behind the stomach and close to the duodenum.