File:Postnatal alveoli number.jpg

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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

  1. Dunnill MS. Postnatal growth of the lung. Thorax 1962;17:329–333.



Cite this page: Hill, M.A. (2024, June 24) Embryology Postnatal alveoli number.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Postnatal_alveoli_number.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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