What is the main function of capillaries in the cardiovascular system?
A. Carrying deoxygenated blood to the lungs
B. Regulating blood distribution to the various tissues
C. Exchanging gases and nutrients with the tissues
D. Transporting blood away from the heart
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What is the main role of plasma in the blood?
A. Transporting O2 and CO2 in the blood
B. Acting as a transport medium for nutrients, proteins, ions, and gases
C. Regulating blood clotting
D. Protecting the body from disease
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