What is the path of blood flow from the heart to the lung tissues and back to the heart?
A. Right ventricle ? pulmonary trunk ? pulmonary arteries ? lung tissues ? pulmonary veins ? left atrium
B. Left ventricle ? aorta ? brachiocephalic artery ? lung tissues ? bronchial veins ? brachiocephalic vein ? superior vena cava ? right atrium
C. Left ventricle ? aorta ? bronchial arteries ? lung tissues ? bronchial veins ? azygos vein ? superior vena cava ? right atrium
D. Right ventricle ? brachiocephalic arteries ? lung tissues ? brachiocephalic veins ? inferior vena cava ? left atrium
Answer: A
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