★ Human Circulatory System Quiz
Blood is poured into the right atrium through
A. vena cava
B. Pulmonary vein
C. aorta
D. Pulmonary artery
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What is the role of platelets in the blood clotting process?
A. Transporting oxygen
B. Producing antibodies
C. Forming clots
D. Regulating body temperature
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