Question

Why does amount of oxygen vary between exhaled and inhaled air​

Answer 1

When we breathe in, the lungs absorb the oxygen and sends it to the bloodstream and leaves the rest. So the amount of oxygen can be seen as a decrease compared to the oxygen in the inhaled air.

Answer 2

Answer:

When we breathe in, the lungs absorb the oxygen and sends it to the bloodstream and leaves the rest. So the amount of oxygen can be seen as a decrease compared to the oxygen in the inhaled air