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

It goes in and goes right back out. At normal air pressures it doesn’t really interact with our bodies chemistry.
At high pressures, like SCUBA diving, it gets absorbed in to our bodies and can cause problems.