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The Vascular System and Blood Flow › ViewWhat is the main role of arteries in the cardiovascular system?
A. Returning blood to the heart
B. Exchanging gases and nutrients with the tissues
C. Regulating blood distribution to the various tissues
D. Carrying oxygenated blood away from the heart
Immunology and Serology › View
Which of the following cells responsible for immunity:
A. WBCs
B. RBCs
C. Platelets
D. APCs