Aortic Arches - Anatomy & Physiology
Revision as of 14:48, 28 August 2008 by Katherine (talk | contribs) (New page: After emerging from the heart the Aortic artery divides in the Right and Left Dorsal branches. Each branch feeds into a set of arches which are unique to the embryo. Most higher vertebrate...)
After emerging from the heart the Aortic artery divides in the Right and Left Dorsal branches. Each branch feeds into a set of arches which are unique to the embryo. Most higher vertebrates have have 6 paris of aortic arches. In the mammal the 5th pair do not form. These arches evolve to form some of the structures of the mammalian circulation. The fate of each arch varies greatly
- Arches 1 and 2 degenerate completely and arch 5 is never present
- The dorsal Aorta that runs between arches 3 and 4 degenerates on both the left and right sides.
- The 6th aortic arch and the dorsal aorta on the right side degenerates.