– 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

Because we don’t exhale one element only. It’s a mixture. And I’m that mixture of an exhale, we also exhale oxygen. The percentage of oxygen in the air when we inhale drops when we exhale it, but alas, it’s still there.