How much oxygen can a person fit in their lungs at a time?
- 1 decade agoFavorite Answer
There's not a straightforward answer to this question. Air contains approximately 21% oxygen, so you can express the 'amount' of oxygen in a person's lung roughly as a percent of the volume of air in the lungs. That volume, though, differs depending on where you are in the respiratory cycle (inhaling, exhaling, or i between), and which volulme you measure (Total Lung Capacity, Forced Vital Capacity, Tidal Volume).
In an adult the Total Lung Capacity is about 5-6L (5000-6000mL), so about 21 % (I know this isn't quite accurate, but just a rough explanation, for those chemists, physicists and physiologists out there) is oxygen. 21% is about 1L in an adult.
How much of that is usable is a completely different question, however.Source(s): This will demonstrate the different lung volumes: http://www.answers.com/topic/lung-volumes