The<unk>  is a structure which divides the the esophagus from the trachea. It divides the foregut tube into the laryngotracheal tube and esophagus.
Developmental abnormalities can lead to a<unk>  fistula.
Tracheoesophageal septum
Aortic arches
Aorticopulmonary septum
Aortopulmonary Window
Base of the heart
Transverse intermuscular septum
Apex of the heart
Ventricular outflow tract