Aortic Arches - Development Of The Vascular System Flashcards
1
Q
1st arch
A
Begins to form part of the maxillary artery and the remainder disappears .
2
Q
2nd arch
A
Disappears
3
Q
3rd arch
A
Forms the common carotid , the first part of the internal carotid and the external carotid .
4
Q
4th arch
A
Forms the aortic arch on the left between the left common carotid /left subclavian , gives rise to part of subclavian on right .
5
Q
5th arch
A
Disappears very early there fore is not noted .
6
Q
6th arch
A
Forms part of the right pulmonary artery . On left forms left pulmonary artery , remains connected to aorta . = allows diversion of blood away from lungs - ductus arteriosus
Dorsal aorta - will combine to form the descending aorta , also forms remainder of internal carotid .
7
Q
7th intersegmental artery
A
Becomes the subclavian :brachial artery
