– 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

We convert oxygen to CO2. But not all of the oxygen in the air.

Normal air has 21% oxygen.

Exhaled air has 16% oxygen.

So it still works because we’re breathing out plenty of oxygen still.