Q.21. Assertion: The average number of heart beat of a person at rest is about 80 per minute.
Reason: One contraction and relaxation of the heart constitutes a complete heart beat.
Answers
Answer: Yes it’s true..
Explanation:
The Average heartbeat of a normal adult ranges from 60- 80 per minute…In ur lifetime it will beat somewhere around 3 billion times. And it takes 0.8 seconds to complete one cycle(diastolic and systolic)
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Assertion: The average number of heart beat of a person at rest is about 80 per minute.
Assertion: CORRECT
The Average heartbeat of a normal adult ranges from 60- 80 per minute…In ur lifetime it will beat somewhere around 3 billion times. And it takes 0.8 seconds to complete one cycle(diastolic and systolic)
The cardiac cycle refers to the pattern of contraction and relaxation of the heart during one complete heartbeat. Contraction of the heart muscle is known as systole and relaxation of the heart muscle is called diastole. ... Ventricular systole (ventricles contract and push blood out through aorta and pulmonary artery)