Heart Function MCQs e-Book PDF | Class 7 Science App Download
Class 7 Science Practice Test: MCQs for Exam Prep
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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 online schools courses. Solve Human Transport System Quiz Questions, download Google eBook (Free Sample) for online degree programs.
When atria contracts, ventricles
The function of the valves is to
The muscles of the atria and ventricles squeeze to
When ventricles contract, atria
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