What vessel in the fetus connects the pulmonary trunk to the aortic arch so that most of the blood bypasses the immature lungs?
A. ductus venosus
B. foramen ovale
C. ductus arteriosus
D. umbilical vein
Answer:C
What vessel in the fetus connects the pulmonary trunk to the aortic arch so that most of the blood bypasses the immature lungs?
A. ductus venosus B. foramen ovale C. ductus arteriosus D. umbilical vein