<Tr> <Th> FMA </Th> <Td> 3786 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> The descending thoracic aorta is a part of the aorta located in the thorax . It is a continuation of the descending aorta and contained in the posterior mediastinal cavity . The descending thoracic aorta begins at the lower border of the fourth thoracic vertebra where it is continuous with the aortic arch, and ends in front of the lower border of the twelfth thoracic vertebra, at the aortic hiatus in the diaphragm where it becomes the abdominal aorta . </P> <P> At its commencement, it is situated on the left of the vertebral column; it approaches the median line as it descends; and, at its termination, lies directly in front of the column . </P>

Where is the descending aorta located in the mediastinum