What is the function of the ductus venosus?
A. It is a shunt between the superior vena cava and aorta that rapidly passes maternal blood to the fetus.
B. It is a shunt that flows between the umbilical vein and inferior vena cava and bypasses the liver.
C. It is a shunt between the umbilical vein and aorta that rapidly passes maternal blood to the fetus.
D. It is a shunt between the right and left atria that bypasses the fetal lungs.
E. It is a shunt between the pulmonary trunk and the aorta that bypasses the fetal lungs.
Answer: B
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