Final answer:
The statement is false because it is the ductus arteriosus, not the ductus venosus, which directs blood away from the fetal lungs to the aorta.
Step-by-step explanation:
The statement that the majority of the blood in the pulmonary trunk is sent through the ductus venosus into the aorta is false. In fetal circulation, it is actually the ductus arteriosus that shunts blood from the pulmonary trunk to the aorta.
The ductus arteriosus connects the pulmonary artery to the aorta, allowing blood to bypass the nonfunctional fetal lungs. Meanwhile, the ductus venosus is responsible for shunting oxygenated blood from the placenta, largely bypassing the liver, and allowing it to enter the inferior vena cava and then the heart.