If air is made up of 78% Nitrogen, our blood uses Oxygen and we exhale Carbon dioxide, what happens to nitrogen?

Question

If air is made up of 78% Nitrogen, our blood uses Oxygen and we exhale Carbon dioxide, what happens to nitrogen?

In: Biology

Answer 1

Pure oxygen is unbreathable. We always breath the whole mixture of air that has the basic components. Then our body automatically utilises Oxygen and discards the others.