Morphometric analysis of postnatal lung development in the tammar wallaby: light microscopy
| Autor: | S. I. C. Runciman, J Lipsett, R.V Baudinette, Bren Gannon |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Pulmonary and Respiratory Medicine
Pathology medicine.medical_specialty Aging Tissue Fixation Physiology Andrology Tammar wallaby Parenchyma Microscopy medicine Animals Lung volumes Respiratory system Lung Macropus Macropodidae biology Body Weight respiratory system biology.organism_classification medicine.anatomical_structure Volume (thermodynamics) Animals Newborn Respiratory Mechanics Lung Volume Measurements |
| Zdroj: | Respiration physiology. 112(3) |
| ISSN: | 0034-5687 |
| Popis: | Postnatal growth of the lung in the tammar wallaby, Macropus eugenii, was investigated using morphometric techniques with light microscopy. Lung volume, parenchymal and non-parenchymal volume densities were measured. Volume densities of parenchymal airspace and tissue and non-parenchymal conducting airways and large blood vessels were determined. Lung volume and all the other parameters that were measured showed a biphasic increase in relation to increase in body mass. All parameters, with the exception of airway volume, increased relatively slowly in relation to increase in mass in the first 70 days after birth, when the pouch young are ectothermic. Between 70 and 180 days, during the period of transition from ectothermy to endothermy, the parameters increased more rapidly, suggesting accelerated lung growth in preparation for the extra metabolic demands associated with the establishment of thermoregulatory control in the pouch young. Specific lung volume in the adult tammar is lower than that of eutherians of equivalent mass, however, the parenchymal volume is relatively high. |
| Databáze: | OpenAIRE |
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