Aortic Arches

Question 1

1st arch Derivative

Answer 1

Part of maxillary artery (branch of external carotid)

Question 2

2nd arch derivative

Answer 2

Part of stapedial and hyoid artery

Question 3

3rd arch derivative

Answer 3

Common carotid artery and proximal internal cartoid

Question 4

4th arch derivative

Answer 4

On left, part of aortic arch, on right, proximal right subclavian.

Question 5

5th arch derivative

Answer 5

Nothing/inconsequential

Question 6

6th arch

Answer 6

Proximal pulmonary arteries. On left, ductus arteriosus. Left recurrent larygneal gets caught here by ductus arteriosus