NEETZoologyBody Fluids and Circulation
What is the definition of cardiac output?
Options
- AThe volume of blood pumped out by each ventricle per minute
- BThe number of beats per minute
- CThe duration of a cardiac cycle
- DThe amount of blood pumped out during a cardiac cycle
Correct answer
A. The volume of blood pumped out by each ventricle per minute
Step-by-step solution
consists of systole and diastole of both the atria and ventricles. As mentioned earlier, the heart beats 72 times per minute, i.e., that many cardiac cycles are performed per minute. From this it could be deduced that the duration of a cardiac cycle is 0.8 seconds. During a cardiac cycle, each ventricle pumps out approximately 70 mL of blood which is called the stroke volume. The stroke volume multiplied by the heart rate (no. of beats per min.) gives the cardiac output. Therefore, the cardiac output can be defined