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Cardiovascular System › ViewWhat is the main function of valves in the circulatory system?
A. To pump blood throughout the body
B. To prevent blood from moving in the wrong direction
C. To prevent platelets from clotting the blood
D. To keep the body stable
Bacteriology › View
If an antibody response were to be initiated against an endotoxin, against what structure would it be directed?
A. Lipid A
B. Core polysaccharide
C. O-polysaccharide
D. None of the choices