| Age (years) | Functional Residual Capacity (mL) | Upper Respiratory Tract (mL) | Breathing Frequency (min−1) | Tidal Volume (mL) |
| 3 | 500¹ | 9.47 | 24 | 121.3 |
| 21 | 1854.54 | 42.27 | 14 | 477.2 |