What is the meaning of systole? Relaxation phase of the heartbeat Contraction phase of the heartbeat The valve between the right atrium and the right ventricle The pacemaker of the heart Question 65 What is bradycardia? Between 60 to 80 beats per minute Slower than 60 beats per minute Over 100 beats per minute Absence of a heart beat

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What is the meaning of systole? Relaxation phase of the heartbeat Contraction phase of the heartbeat The valve between the right atrium and the right ventricle The pacemaker of the heart Question 65 What is bradycardia? Between 60 to 80 beats per minute Slower than 60 beats per minute Over 100 beats per minute Absence of a heart beat

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**Question 64:**Systole is the **contraction phase of the heartbeat**. During systole, the heart muscle contracts, pumping blood out of the chambers.**Question 65:**Bradycardia is a heart rate **slower than 60 beats per minute**.

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