Runciman S I, Baudinette R V, Gannon B J, Lipsett J
Department of Anatomy and Histology, School of Medicine, The Flinders University of South Australia, Adelaide, Australia.
Respir Physiol. 1998 Feb;111(2):177-87. doi: 10.1016/s0034-5687(97)00114-x.
The lung of the new-born marsupial is at the terminal air sac stage of development. The maturational status of the lung of new-born tammar wallaby was assessed using established morphometric techniques and the results were compared with data from a morphometric study of the lung of the rat. Volume densities of the parenchyma and non-parenchyma, conducting airways and blood vessels, the relative volumes of airspace and tissue, the thickness and the composition of the septa differed between the two species. In addition the volume of capillaries and the surface area of the effective gas-exchange tissue was greater in the new-born rat than in the new-born tammar pouch young. The lung of the new-born tammar appears to be at an earlier phase of the terminal air sac stage than that of the new-born rat. Lung development up to birth appears to be commensurate to the metabolic needs of the organism at birth.
新生有袋动物的肺处于发育的终末气囊阶段。采用既定的形态测量技术评估新生帚尾袋貂肺的成熟状态，并将结果与大鼠肺形态测量研究的数据进行比较。两种物种的实质和非实质、传导气道和血管的体积密度、气腔和组织的相对体积、隔膜的厚度和组成均有所不同。此外，新生大鼠的毛细血管体积和有效气体交换组织的表面积大于新生帚尾袋貂幼崽。新生帚尾袋貂的肺似乎比新生大鼠处于终末气囊阶段的更早时期。出生前的肺发育似乎与出生时生物体的代谢需求相称。
