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

All the nitrogen is there and doesn’t reacts with anything. Also you statement is technically wrong we breathe in Oxygen rich air and exhale carbon dioxide rich air.