File:Postnatal alveoli number.jpg
Postnatal_alveoli_number.jpg (800 × 504 pixels, file size: 26 KB, MIME type: image/jpeg)
Respiratory Alveoli
Respiratory alveoli and respiratory airway numbers continue to increase postnatally through childhood. The total number of both plateauing at 7 to 8 years of age. This suggests that in addition to genetic effects, the postnatal environment can influence respiratory development.
| Age (months) | Alveoli (million) | Respiratory Airways (million) | Generations of Airways |
| Birth | 24 | 1.5 | |
| 3 | 86 | 1.8 | |
| 3 | 77 | 2.5 | 21 |
| 3 | 73 | 2.0 | |
| 7 | 112 | 3.7 | |
| 13 | 129 | 4.5 | 22 |
| 16 | 127 | 4.7 | |
| 22 | 160 | 7.1 | |
| 48 | 257 | 7.9 | |
| 98 | 280 | 14.0 | 23 |
| Adult | 296 | 14.0 | 23 |
| Data modified from [1]
Links: respiratory | Respiratory Comparison | Mouse Human Respiratory | Mouse respiratory stages | mouse | rat | rabbit | Timeline Comparisons | |||
Reference
- ↑ Dunnill MS. Postnatal growth of the lung. Thorax 1962;17:329–333.
Cite this page: Hill, M.A. (2026, September 28) Embryology Postnatal alveoli number.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Postnatal_alveoli_number.jpg
- © Dr Mark Hill 2026, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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