If our body needs oxygen in the air to live. then what the 77% of nitrogen do to our body?

Question

as I was told from early education that the air we currently breathe in contains 21% oxygen and 77-ish% of nitrogen and the rest are other particles.

So I have a dumb question on what the body uses nitrogen we breathe in for?

In: 387

Answer 1

It is the equivalent of swallowing a marble. It just passes through without any interaction. Kind of like the air equivalent of fiber.