Belonging to the upper gastrointestinal tract, the esophagus – in simplest terms – is the connector that leads from the oral cavity to the stomach. It is responsible for moving the food which is ingested with the help of muscular contractions. Some patients are surprised to hear that there are several digestive system disorders that appear to target specifically the esophagus, yet when you glean a thorough understanding of their causality, the presence of these ailments makes sense.