In the above table why is there no change in nitrogen percentage ?

Question

Observe the table and answer the following.

| Gas | % in inhaled air | % in exhaled air |
| Oxygen | 21.00 | 16 |
| CO2 | 0.03 | 4 |
| Nitrogen | 78 | 78 |

In the above table why is there no change in nitrogen percentage ?

Answer 1

Nitrogen has no role in our respiration. So there is no change in the percentage of nitrogen.