The esophagus (ĕ-sof´ah-gus) is the hollow, muscular tube that moves food and liquid from the mouth to the stomach. The wall of the esophagus is made up of several layers of tissue, including muscle, connective tissue that supports the framework of the body, and an inner lining called the mucosa.
http://ctsurgerypatients.org/lung-esophageal-and-other-chest-diseases/esophageal-cancer