part of aorta embryo dorsal aorta 2010-05-12T10:55:29Z BTO:0004673 BrendaTissueOBO The artery in vertebrate embryos that transports blood from the aortic arches to the trunk and limbs. In adult fish it is a major artery that carries oxygenated blood from the efferent branchial arteries to branches that supply the body organ. In adult tetrapods it arises from the systemic arch. dorsal aortic root mgr