Uberon related term : 4th pharyngeal arch artery; systemic arch; 4th branchial arch artery; 4th aortic arch artery;
Uberon Development note : Normally, the left fourth arch becomes the aortic arch, the right fourth arch contributes
to the innominate artery[http://emedicine.medscape.com/article/899609-overview] in
birds it is the right fourth arch which forms the permanent aorta;