Understanding GDV, also known as bloat, begins with understanding digestive system anatomy. The affected organs include the esophagus, stomach, duodenum, small intestines, and spleen. The esophagus is the tube that runs from the mouth to the stomach; it is a hollow dilation of the gastrointestinal tract where food is initially digested. The spleen is attached to the stomach by a series of blood vessels and the gastroplenic ligament. The duodenum is the first part of the small intestine as it leaves the stomach.