– 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 do not breathe in oxygen and breathe out CO2. You breathe in air and breathe out air. Air has a varying degree of oxygen, CO2, nitrogen and other gases. The air you breathe out still has plenty of oxygen, just less than before