Arch 6


Arterial arches video   -Interactive video text

The 6th arch becomes the pulmonary artery which joins the lung but maintains its connection to the dorsal aorta which has now become the arch of the aorta. This connection is the ductus arteriosus. Before the development of the arches reach maturity, the dorsal aortae have formed at the level of the 6th lumbar vertebra so that they are just single dorsal aortae but the connection from the right 6th arch to the single dorsal aorta at T4-L4 now regresses. The regression also enters to the 4th arch that has now formed the brachiocephalic trunk and the right subclavian artery. Hence the 6th arch on the right just becomes the pulmonary artery.


 

 

 

 

 

 

 

 

 

 

 

 

 

 

   

Oluwole Ogunranti

Practical  Gross  Museum  Scan  Malformations

 

 

 

 

 

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