________ Forms from the sixth pharyngeal arch artery
A)A
B)B
C)C
D)D

Question

________ Forms from the sixth pharyngeal arch artery
A)A 
B)B 
C)C 
D)D

Quizplus · Accepted Answer

The ductus arteriosus develops from the distal portion of the left sixth aortic arch artery.It passes from the left pulmonary artery to the aorta and,before birth,carries most of the blood from the pulmonary trunk into the aorta.The lungs are not functioning and so require little blood.The ductus arteriosus usually constricts slightly after birth and closes anatomically during the first 3 months.

________ Forms from the Sixth Pharyngeal Arch Artery