BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS
CARDIOVASCULAR SYSTEM
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Question
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What is the definition of the Cardiac Cycle?
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the contraction of the atria
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the sequence of events that occur during one complete heartbeat
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the contraction and relaxation of the ventricles
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the circulation of blood in the heart, lungs and body
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Explanation:
Detailed explanation-1: -The cardiac cycle is the performance of the human heart from the beginning of one heartbeat to the beginning of the next. It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, following a period of robust contraction and pumping of blood, called systole.
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