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The Vascular System and Blood Flow › ViewWhat is the main function of veins in the cardiovascular system?
A. Regulating blood distribution to the various tissues
B. Carrying oxygenated blood away from the heart
C. Exchanging gases and nutrients with the tissues
D. Returning blood to the heart for another trip throughout the vascular system
Blood Donation › View
How mush blood is taken during a blood donation?
A. approx 100mls
B. approx 500ml
C. approx 1 Litre