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To which heart chambers do the terms systole and diastole usually apply?

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Final answer:

During the cardiac cycle, systole and diastole apply to all four heart chambers. Systole is the contraction phase when the heart pumps blood, and diastole is the relaxation phase when the chambers fill with blood.

Step-by-step explanation:

During the cardiac cycle, the terms systole and diastole usually apply to all four heart chambers. Systole refers to the period of contraction when the heart pumps blood into circulation, while diastole refers to the period of relaxation when the chambers fill with blood. It is important for both the atria and ventricles to undergo systole and diastole in a coordinated manner for efficient blood pumping.

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