7. Summary
• Ascending aorta & pulmonary trunk
---truncus arteriosus
• Arch of aorta---ventral part of the aortic sac
& its left horn & the left 4th
arch artery
• Descending aorta—left dorsal aorta below
the attachment of 4th
artery, along with the
fused median vessels
• Brachicephalic art—right horn of the aortic
sac
8. • Common carotid art—part of the 3rd
aortic arch.
• Internal carotid art—portion of the 3rd
arch
artery distal to the bud, along with the original
dorsal aorta cranial of the 3rd
arch artery
• External carotid artery—arises as a bud from
the 3rd
arch artery
• Pulmonary artery—part of the 6th
arch arteries
lying between the pulmonary trunk & the
branches to the lung buds
9. • Ductus arteriosus—the part of the left 6th
arch artery, between the branch to the lung
bud & the aorta, forms the ductus arteriosus.
• Developmental anomalies
I. Double aortic arch
II.Right aortic arch
III.Interrupted aortic arch
IV.Coarctation of aorta
V.Patent ductus arteriosus
