Respiratory System - Postnatal
From Embryology
Postnatal
Alveoli
- At birth about 15% of adult alveoli number have formed
- 20 - 50 million to in the adult about 300 million.
- remaining subdivisions develop in the first few postnatal years
- Alveoli Number
Respiratory Rate
- neonatal rate is higher (30-60 breaths/minute) than adult (12-20 breaths/minute).
- tachypnea - (Greek, rapid breathing) an increased respiratory rate of greater than 60 breaths/minute in a quiet resting baby
| Age | Rate (breaths/minute) |
| Infant (birth - 1 year) | 30 - 60 |
| Toddler (1 - 3 years) | 24 - 40 |
| Preschool (3 - 6 years) | 22 - 34 |
| School age (6 - 12 years) | 18 - 30 |
| Adolescent (12 - 18 years) | 12 - 16 |
Rib Orientation
- Infant rib - is virtually horizontal, allowing diaphragmatic breathing only.
- Adult rib - is oblique (both anterior and lateral views), allows for pump-handle and bucket handle types of inspiration.
References
Reviews
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Articles
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Search PubMed
Search Pubmed: PostnatalTract Development |
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Cite this page: Hill, M.A. (2024, April 24) Embryology Respiratory System - Postnatal. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Respiratory_System_-_Postnatal
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
