Source:http://linkedlifedata.com/resource/umls/id/C0003489
NCI: The curved section of the aorta between the ascending and the descending tracts. The brachiocephalic, left common carotid and left subclavian arteries branch from the aorta at this section. (NCI),NCI: The curved section of the aorta between the ascending and the descending tracts. The brachiocephalic, left common carotid and left subclavian arteries branch from the aorta at this section.