Ontogenetic changes in the fractal geometry of the bronchial tree in Rattus norvegicus

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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Autores principales: CANALS,MAURICIO, OLIVARES,RICARDO, LABRA,FABIAN, NOVOA,FRANCISCO F
Lenguaje:English
Publicado: Sociedad de Biología de Chile 2000
Materias:
Bronchial tree
Fractals
Ontogeny
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000100010
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spelling oai:scielo:S0716-976020000001000102000-11-27Ontogenetic changes in the fractal geometry of the bronchial tree in Rattus norvegicusCANALS,MAURICIOOLIVARES,RICARDOLABRA,FABIANNOVOA,FRANCISCO F Bronchial tree Fractals Ontogeny 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 mammalsinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.33 n.1 20002000-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000100010en10.4067/S0716-97602000000100010
institution Scielo Chile
collection Scielo Chile
language English
topic Bronchial tree
Fractals
Ontogeny
spellingShingle Bronchial tree
Fractals
Ontogeny
CANALS,MAURICIO
OLIVARES,RICARDO
LABRA,FABIAN
NOVOA,FRANCISCO F
Ontogenetic changes in the fractal geometry of the bronchial tree in Rattus norvegicus
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
author CANALS,MAURICIO
OLIVARES,RICARDO
LABRA,FABIAN
NOVOA,FRANCISCO F
author_facet CANALS,MAURICIO
OLIVARES,RICARDO
LABRA,FABIAN
NOVOA,FRANCISCO F
author_sort CANALS,MAURICIO
title 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_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_sort ontogenetic changes in the fractal geometry of the bronchial tree in rattus norvegicus
publisher Sociedad de Biología de Chile
publishDate 2000
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000100010
work_keys_str_mv AT canalsmauricio ontogeneticchangesinthefractalgeometryofthebronchialtreeinrattusnorvegicus
AT olivaresricardo ontogeneticchangesinthefractalgeometryofthebronchialtreeinrattusnorvegicus
AT labrafabian ontogeneticchangesinthefractalgeometryofthebronchialtreeinrattusnorvegicus
AT novoafranciscof ontogeneticchangesinthefractalgeometryofthebronchialtreeinrattusnorvegicus
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