Does exhaled air contain about 10% oxygen?

Exhaled air contains approximately 16% oxygen, not 10%. When we inhale, we take in air that is about 21% oxygen. During respiration, our bodies utilize some of this oxygen, and the air that we exhale has a lower concentration of oxygen. The exchange of gases in the lungs means that while exhaled air is rich in carbon dioxide, its oxygen content decreases as it has already been partially consumed by our bodies. This is why the statement regarding exhaled air containing about 10% oxygen is inaccurate. Thus, choosing "False" is the correct understanding of the composition of exhaled air.