Physiological problems of alveolar circulation in the lungs

: Since the volume of the blood passing the lungs is great in the norm and especially during stressed muscle activity the question arises about the rate of the blood oxygenation. In the norm, when about 6 1 of the blood passes the lungs per minute, each 500 ml of the blood, which comprises the blood capacity of the lungs, is oxygenated during approximately 5 seconds. During muscle work, when the minute volume of the blood increases to 18-20 1, each 500 ml of the blood are oxygenated during 1-1.5 seconds. It is necessary to reveal the mechanisms of accelerating the blood oxygenation in the alveoli.