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Per NCERT, what is the FUNCTION of VALVES in the heart?
AStore extra blood
BFilter the blood
CMake heart sounds
DEnsure that blood flows in ONE DIRECTION only — preventing backflow when atria or ventricles contract
Answer & Solution
Correct answer: D. Ensure that blood flows in ONE DIRECTION only — preventing backflow when atria or ventricles contract
Per NCERT §5.4.1, heart valves prevent backflow. The other options misstate.
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