Question

What is the difference between cardiac output and stroke volume?

Answer 1

Hint: The cardiac output and the stroke volume are related to the heart. The stroke volume is the amount of blood the heart pumps in each beat. Cardiac output is dependent on the heartbeat.

Complete answer:
The heart is the chief organ for circulation in the body. It contracts and relaxes leading to the pumping of the blood. The heart rate is defined as the number of times the heart beats in one minute. The normal heart rate of an individual is 70 beats per minute. The heart rate affects the cardiac output and the stroke volume.
The cardiac output and the stroke volume are dependent on each other and also on the heart rate. Let us discuss the difference between cardiac volume and stroke volume.

Cardiac output	Stroke volume
It is the volume of the blood that the heart pumps out in one minute	It is the volume of the blood that is pumped out of the left ventricle of the heart during systole.
It is calculated as the product of stroke volume and heart	It is calculated as the difference between the diastolic volume and end-systolic volume
Its normal value is 3 to 5 litre per minute	Its value is 60-70 ml per heartbeat.
It depends on the oxygen requirement of the tissue	The preload, afterload and contraction affect stroke volume.

Note: When the stroke volume increases, the cardiac output also increases. The period of contraction and relaxation is called systole and diastole. The balance between the two determines the blood pressure.