Runciman S I, Baudinette R V, Gannon B J, Lipsett J
Department of Anatomy and Histology, School of Medicine, Flinders University of South Australia, Adelaide, Australia.
Respir Physiol. 1998 Jun;112(3):325-37. doi: 10.1016/s0034-5687(98)00034-6.
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.
利用光学显微镜形态测量技术，对帚尾袋貂（Macropus eugenii）出生后肺的生长情况进行了研究。测量了肺体积、实质和非实质体积密度。测定了实质气腔、组织以及非实质传导气道和大血管的体积密度。肺体积以及所有其他测量参数均显示出与体重增加相关的双相增长。除气道体积外，所有参数在出生后的前70天内，相对于体重增加而言增长相对缓慢，此时育儿袋幼崽为变温动物。在70至180天之间，即从变温向恒温转变的时期，这些参数增长得更快，这表明肺生长加速，以应对育儿袋幼崽建立体温调节控制所带来的额外代谢需求。成年帚尾袋貂的比肺体积低于同等体重的真兽类动物，然而，其实质体积相对较高。
