Class 7 science Practice Tests
Class 7 Science Online Tests
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The MCQ: When atria contracts, ventricles; "Heart Function" App Download (Free) with answers relax, also contract, squeeze and block to learn homeschool online courses. Solve human transport system quiz questions, download Google eBook (Free Sample) for online study.
MCQ 1: When atria contracts, ventricles
MCQ 2: The function of the valves is to
MCQ 3: The muscles of the atria and ventricles squeeze to
MCQ 4: When ventricles contract, atria
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