★ Cardiovascular System Anatomy Quiz
The large blood vessel that returns blood to the right atrium is called the:
A. Aorta
B. Vena Cava
C. Pulmonary artery
D. Pulmlonary vein
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What is the function of a valve?
A. Helps blood to clot
B. Keeps blood flowing in all directions
C. Keeps blood flowing in one direction
D. Stops blood from flowing
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