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  4. Cardiac output is defined as the amount of blood

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Q. Cardiac output is defined as the amount of blood

NTA AbhyasNTA Abhyas 2022

Solution:

The ventricle pumps blood outside into the circulation. Each ventricle pumps out around 70 mL of blood in each cardiac cycle. This is called the stroke volume. Heart rate is the number of times the heart beats per minute or in other words the number of times a cardiac cycle occurs in a minute. Thus the stroke volume (the volume pumped out by each ventricle in one cardiac cycle) multiplied by heart rate (the number of cardiac cycles occurring in a minute) gives us the cardiac output. Thus the cardiac output is the amount of blood pumped out by each ventricle per minute. It is around 5 L or 5000 mL in a healthy individual.