part_of part of part of connected to connected to develops_from develops from develops from has developmental contribution from has developmental contribution from aorta circulatory system arch of aorta descending aorta UBERON:0001514 pars descendens aortae The descending aorta is the portion of the aorta in a two-pass circulatory system from the arch of aorta to the point where it divides into the common iliac arteries[GO]. The descending aorta is part of the aorta, the largest artery in the body. The descending aorta is the part of the aorta beginning at the aortic arch that runs down through the chest and abdomen. The descending aorta is divided into two portions, the thoracic and abdominal, in correspondence with the two great cavities of the trunk in which it is situated. Within the abdomen, the descending aorta branches into the two common iliac arteries which serve the legs. [WP,unvetted]. EMAPA:18606 NCIT:C32455 Wikipedia:Descending_aorta MA:0002571 pars descendens aortae SCTID:261399002 FMA:3784 aorta descendens left dorsal aorta right dorsal aorta section of aorta dorsal aorta