Esophagus:A muscular tube that conveys food from the throat to the stomach through rhythmic contractions known as peristalsis.
Stomach:A hollow organ involved in digestion, which secretes acid and enzymes to break down food before it moves into the small intestine.
Gastroesophageal reflux disease (GERD): A condition where stomach acid frequently flows back into the esophagus, often caused by a malfunction of the cardia