– If humans breathe in oxygen and exhale CO2, then why does mouth-to-mouth resuscitation work?

Question

– If humans breathe in oxygen and exhale CO2, then why does mouth-to-mouth resuscitation work?

In: 172

Answer 1

You don’t exhale pure CO2. There is just a little bit more of it in the air you breathe out. A tiny bit more, just a few percent more.

We also do not inhale pure oxygen.