Yeah but, lungs may be 3 liters, a breath may be 1 liter, which means 2 liters are retained each time we breathe. So substituting maybe 200 mL of fresh air for the same volume of mask air is only a 10% increase in retained air and a 10% decrease in fresh air.
The numbers are rough estimates but I think the point is valid.
Yeah but, lungs may be 3 liters, a breath may be 1 liter, which means 2 liters are retained each time we breathe. So substituting maybe 200 mL of fresh air for the same volume of mask air is only a 10% increase in retained air and a 10% decrease in fresh air.
The numbers are rough estimates but I think the point is valid.
Yeah but, lungs may be 3 liters, a breath may be 1 liter, which means 2 liters are retained each time we breathe. So substituting maybe 200 mL of fresh air for the same volume of mask air is only a 10% increase in retained air and a 10% decrease in fresh air.
The numbers are rough estimates but I think the point is valid.