Q. Average cardiac output is
Solution:
During a cardiac cycle, each ventricle pumps out approximately 70 ml of blood. This is called the stroke volume. The stroke volume multiplied by the number of beats per minute (heart rate) gives the cardiac output. The cardiac output is (72 x 70) or 5040 ml per minute, i.e., about 5 litres per minute. Therefore, the volume of blood pumped out by each ventricle per minute is known as the cardiac output.
Cardiac output = stroke volume X number of beats per minute
= 70 mL/beat X 72 beats/min = 5040 mL/min, which is approximately 5L/min.
About 5L of blood is present in an adult male. The entire blood volume flows through the heart every minute.
Cardiac output = stroke volume X number of beats per minute
= 70 mL/beat X 72 beats/min = 5040 mL/min, which is approximately 5L/min.
About 5L of blood is present in an adult male. The entire blood volume flows through the heart every minute.