Profile view of a human embryo estimated at twenty or twenty-one days old. (Dorsal aorta labeled at center left.)
The dorsal aortae are paired (left and right) embryological vessels which progress to form the descending aorta. The paired dorsal aortae arise from aortic arches that in turn arise from the aortic sac.
Each primitive aorta anteriorly receives the vitelline vein from the yolk-sac, and is prolonged[clarification needed] backward on the lateral aspect of the notochord under the name of the dorsal aorta.
The two dorsal aortae combine to become the descending aorta in later development.
- http://www.embryology.ch/anglais/pcardio/arterien02.html. Retrieved 10 April 2017. Missing or empty