How does the lungs know which is O2 and CO2? We breathe a ton of different gasses daily but what happens to the other gases other than O2 and CO2 when inhaled?

Question

How does the lungs know which is O2 and CO2? We breathe a ton of different gasses daily but what happens to the other gases other than O2 and CO2 when inhaled?

In: 729

Answer 1

There’s a lot of CO2 inside, there’s a lot of O2 outside, both go from were there is much to were there is little.

The lungs and their blood it’s the place where they can meet and go from the inside, to the outside, or backwards, they just move from where there is a lot to where there is little.