The portion of the descending aorta proceeding from the arch of the aorta and extending to the DIAPHRAGM, eventually connecting to the ABDOMINAL AORTA.

Synonyms: Thoracic Aorta, Arch of the Aorta, Aortic Arch, Descending Aorta, Arch, Aortic, Aorta, Thoracic, Aorta, Descending