relationship loss: part_of axial vasculature (TAO:0001073)[TAO]

http://upload.wikimedia.org/wikipedia/commons/f/fb/Gray459.png

Principal unpaired, median artery of the trunk, leading from the paired roots (radices) of the dorsal aorta to the caudal artery. Kimmel et al, 1995.[TAO], 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, Each primitive aorta receives anteriorly a vein 'the vitelline vein' from the yolk-sac, and is prolonged backward on the lateral aspect of the notochord under the name of the dorsal aorta. The dorsal aortae give branches to the yolk-sac, and are continued backward through the body-stalk as the umbilical arteries to the villi of the chorion. The two dorsal aortae combine to become the descending aorta in later development[WP].

uberon

dorsal aortæ, aortae dorsales, dorsal aortic root, dorsal aortae, dorsal aorta root

When vertebrates first appeared, they must have possessed a ventral and dorsal aorta with aortic arches between them.[well established][VHOG]

UBERON:0005805

• pair of dorsal aortae

• vitelline artery
• caudal artery

• aortico-pulmonary spiral septum

• descending aorta
• intersomitic vessel

• vitelline artery
• caudal artery
• right dorsal aorta
• left dorsal aorta