Meban C
J Anat. 1979 Jan;128(Pt 1):215-24.
The respiratory epithelium in the lungs of the common fire salamander (Salamandra salamandra) has been studied by electron microscopy. The entire pulmonary gas-exchange area is covered by a continuous epithelium, the cells of which are all of the same type and are termed 'pneumonocytes'. Typically, each pneumonocyte is squamous and has attenuated sheets of cytoplasm which extend over the pulmonary capillaries. Its free surface bears squat microvilli, and osmiophilic inclusion bodies and other organelles are prominent in the cytoplasm. The lateral cell walls have numerous desmosomes and interdigitating cytoplasmic processes. Many cells send cytoplasmic processes deep into the substance of the lung septa. The morphological evidence suggests that the pneumonocytes are responsible for the secretion of pulmonary surface-active agents and for maintaining the integrity of the gaseous diffusion membrane.
通过电子显微镜对普通火蝾螈（Salamandra salamandra）肺部的呼吸上皮进行了研究。整个肺气体交换区域被一层连续的上皮覆盖，其细胞均为同一类型，被称为“肺细胞”。通常，每个肺细胞呈鳞状，有延伸至肺毛细血管上的变薄的细胞质片层。其游离表面有短粗的微绒毛，嗜锇性包涵体和其他细胞器在细胞质中很突出。细胞侧壁有许多桥粒和相互交错的细胞质突起。许多细胞将细胞质突起深入到肺间隔实质中。形态学证据表明，肺细胞负责肺表面活性物质的分泌以及维持气体扩散膜的完整性。
