The esophagus is the hollow tube that leads from the throat (pharynx) to the stomach. Food does not just fall through the esophagus into the stomach. The walls of the esophagus propel food to the stomach by rhythmic waves of muscular contractions called peristalsis. In the adult, it is around 11-13 inches long (28-33 cm) and has an internal diameter around three quarters of an inch (2 cm). The Inner layer or lining (mucosa): The lining of the esophagus is moist so that food can pass to the stomach. In the adult, it is around 11-13 inches long (28-33 cm) and has an internal diameter around three quarters of an inch (2 cm). The Inner layer or lining (mucosa): The lining of the esophagus is moist so that food can pass to the stomach. Mint triggers acid reflux for many. Chamomile, licorice, slippery elm, and marshmallow may make better herbal remedies to soothe GERD symptoms. Licorice helps increase the mucus coating of the esophageal lining, which helps calm the effects of stomach acid. The esophagus is a muscular tube connecting the throat (pharynx) with the stomach. The esophagus is about 8 inches long, and is lined by moist pink tissue called mucosa. The esophagus runs behind the windpipe (trachea) and heart, and in front of the spine. Just before entering the stomach, the esophagus passes through the diaphragm.