Question

The percentage of oxygen absorbed from the air in the lungs is always about the same ,so how can the oxygen supply to the blood be increased during vigorous activity?explain?

Answer 1

During vigorous activity heart rate increases which ... so how can the oxygen supply to the blood be increased during .....

Answer 2

Answer:

oxygen supplies to the blood by increased pO2 in lungs and decrease pCO2 and also increase pCO2 and decrease pO2 in blood. it caused because of air pressure difference in lungs and blood veins.