Seems like we breath so fast? So how does the exchange happen so quickly?
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Your lungs have small sacks at the bottom of them (alveoli) which change oxygen into usable energy for your body. The product of this process is C02
Not sure which of the two you’re asking;
Your lung is more of a sponge than it is a balloon. So when you breathe in, it has lots of surface area to exchange air with, so a lot can be exchanged within a short time.
You don’t breathe the same oxygen out as carbon dioxide you just took into your body, the CO2 molecules are made with oxygen you breathed in previously.
It is happening all the time and collects in the lungs from being transferred in the liquid in the blood (the serum). https://youtu.be/cF0rwEd05VY
If you lit a candle and blew the smoke away, it doesn’t linger. Gasses can move very quickly, so it wouldn’t be hard for the CO2 to get out no matter how quickly or slowly you breathe.
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