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    Biology GCSE

    Effect of faulty valves on circulation

    What Effect of faulty valves on circulation means in Biology GCSE, as defined for AQA.

    Definition of Effect of faulty valves on circulation

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    A faulty valve may fail to close completely, allowing blood to leak backwards, or may be narrowed, restricting forward flow.
    AQA · Coronary heart disease: a non-communicable disease (study guide)

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