Ontogenetic changes in the fractal geometry of the bronchial tree in Rattus norvegicus
Respiration and metabolism change dramatically over the course of the development of vertebrates. In mammals these changes may be ascribed to organogenesis and differentiation of structures involved in gas exchange and transport and the increase in size. Since young as well as mature individuals mus...
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| Format: | Article |
| Language: | English |
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BMC
2000-01-01
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| Series: | Biological Research |
| Subjects: | |
| Online Access: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000100010 |
| _version_ | 1819083015884636160 |
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| author | MAURICIO CANALS RICARDO OLIVARES FABIAN LABRA FRANCISCO F NOVOA |
| author_facet | MAURICIO CANALS RICARDO OLIVARES FABIAN LABRA FRANCISCO F NOVOA |
| author_sort | MAURICIO CANALS |
| collection | DOAJ |
| description | Respiration and metabolism change dramatically over the course of the development of vertebrates. In mammals these changes may be ascribed to organogenesis and differentiation of structures involved in gas exchange and transport and the increase in size. Since young as well as mature individuals must be well-designed if the species is to survive, the physiological changes during the development should be matched with geometrical or structural adjustments of the respiratory system. The aim of this study was to evaluate changes in the fractal geometry of the bronchial tree during the postnatal development of the rat. The average fractal dimension of the bronchial tree of the rats was 1.587, but that of juveniles was larger than that of the adults. We found a significant negative correlation between age and fractal dimension. This correlation could be considered be misleading because of the difficulty of separating age/body size effects. Nevertheless, because fractal dimensions of the bronchial tree of rabbits and humans are known to be similar, 1.58 and 1.57 respectively, the body size effect may be nil. To our knowledge, this is the first report of ontogenetic changes in the fractal dimension of the bronchial tree in mammals |
| first_indexed | 2024-12-21T20:25:51Z |
| format | Article |
| id | doaj.art-d32db40ce56f4a2c96b950cab087cc1b |
| institution | Directory Open Access Journal |
| issn | 0716-9760 0717-6287 |
| language | English |
| last_indexed | 2024-12-21T20:25:51Z |
| publishDate | 2000-01-01 |
| publisher | BMC |
| record_format | Article |
| series | Biological Research |
| spelling | doaj.art-d32db40ce56f4a2c96b950cab087cc1b2022-12-21T18:51:23ZengBMCBiological Research0716-97600717-62872000-01-013313135Ontogenetic changes in the fractal geometry of the bronchial tree in Rattus norvegicusMAURICIO CANALSRICARDO OLIVARESFABIAN LABRAFRANCISCO F NOVOARespiration and metabolism change dramatically over the course of the development of vertebrates. In mammals these changes may be ascribed to organogenesis and differentiation of structures involved in gas exchange and transport and the increase in size. Since young as well as mature individuals must be well-designed if the species is to survive, the physiological changes during the development should be matched with geometrical or structural adjustments of the respiratory system. The aim of this study was to evaluate changes in the fractal geometry of the bronchial tree during the postnatal development of the rat. The average fractal dimension of the bronchial tree of the rats was 1.587, but that of juveniles was larger than that of the adults. We found a significant negative correlation between age and fractal dimension. This correlation could be considered be misleading because of the difficulty of separating age/body size effects. Nevertheless, because fractal dimensions of the bronchial tree of rabbits and humans are known to be similar, 1.58 and 1.57 respectively, the body size effect may be nil. To our knowledge, this is the first report of ontogenetic changes in the fractal dimension of the bronchial tree in mammalshttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000100010Bronchial treeFractalsOntogeny |
| spellingShingle | MAURICIO CANALS RICARDO OLIVARES FABIAN LABRA FRANCISCO F NOVOA Ontogenetic changes in the fractal geometry of the bronchial tree in Rattus norvegicus Biological Research Bronchial tree Fractals Ontogeny |
| title | Ontogenetic changes in the fractal geometry of the bronchial tree in Rattus norvegicus |
| title_full | Ontogenetic changes in the fractal geometry of the bronchial tree in Rattus norvegicus |
| title_fullStr | Ontogenetic changes in the fractal geometry of the bronchial tree in Rattus norvegicus |
| title_full_unstemmed | Ontogenetic changes in the fractal geometry of the bronchial tree in Rattus norvegicus |
| title_short | Ontogenetic changes in the fractal geometry of the bronchial tree in Rattus norvegicus |
| title_sort | ontogenetic changes in the fractal geometry of the bronchial tree in rattus norvegicus |
| topic | Bronchial tree Fractals Ontogeny |
| url | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000100010 |
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