★ Cardiovascular System Anatomy Quiz
Why does the blood turn dark red as it circulates through the body?
A. Because the heart is pumping blood to the brain
B. Because Oxygen is replaced with Carbon Dioxide
C. Because there are no platelets
D. Because Carbon Monoxide is replaced with Oxygen
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As a general rule, what type of blood vessels carry oxygenated blood?
A. Arteries
B. Veins
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