Anatomy of Oesophagus The oesophagus is a fibromuscular tube approximately 25 cm long in adults, extending from the lower end of the pharynx (C6) to the stomach’s cardiac end (T11). It runs vertically downwards with slight leftward inclinations at the thoracic inlet and near the diaphragm (T7-T10). It passes behind the trachea, traverses the superior and posterior mediastina of the thorax, and enters the stomach. What is Esophagus? Its Structure, location in the human body, function, problems, diseases anddisorders associated and much more with diagrams and pictures... Learn about the esophagus ( oesophagus ), a 25 cm long fibromuscular tube that connects the pharynx to the stomach. Find out its anatomy, sphincters, blood supply, innervation, and related structures. This article discusses the anatomy of the esophagus, its function, conditions that may affect it, and when to speak with a doctor.