The fetal pulmonary trunk is attached to the fetal aorta via the ________
A) ductus arteriosus
B) ligamentum arteriosum
C) brachiocephalic artery
D) left subclavian artery
A
Explanation:
B) The ligamentum arteriosum is a remnant of fetal circulation when the pulmonary trunk was connected to the aorta by a vessel called the ductus arteriosus.
C) The brachiocephalic artery branches off the aortic arch and carries blood to the head and right forelimb.
D) The left subclavian artery branches off the aortic arch and carries blood to the left forelimb.
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