P in the heart have thicker muscular walls than Q do. Also, R ensure t – InterviewSolution

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1.	P in the heart have thicker muscular walls than Q do. Also, R ensure that blood does not flow backwards when the atria or ventricles contract. P is ___ Q is ___ and R is ___
Answer» P in the heart have thicker muscular walls than Q do. Also, R ensure that blood does not flow backwards when the atria or ventricles contract. P is ___ Q is ___ and R is ___

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