Among the blood vessels directly connected to the four chambers of the human heart, the venous blood vessels that flow arterial blood are_______
A. pulmonary artery
B. pulmonary veins
C. aorta
D. superior and inferior vena cava
Answer:B
Among the blood vessels directly connected to the four chambers of the human heart, the venous blood vessels that flow arterial blood are_______
A. pulmonary artery B. pulmonary veins C. aorta D. superior and inferior vena cava