The heart works rhythmically, alternating between contraction (systole) and relaxation (diastole). The brief period of relaxation between two successive heartbeats, when the chambers fill with blood, is considered the heart's moment of "rest".
When does heart rest ?
Asked in UPPCS Prelims 2008 · Topic: Circulatory System (Cardiac Cycle: Systole, Diastole, Heart Sounds)
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