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近年来由于对肺泡结构的电子显微镜研究,进一步揭示了肺的正常结构和病理改变。已经证明,在正常肺泡内面密布着一层非细胞性连续层(acellular continuouslayer),并称之为肺泡的表面活性物质(Sur-factant),又名肺泡表面张力活性物质或表面活性剂。这种活性物质对于维持肺泡间的稳定性,具有重要的生物学意义。本文根据所阅文献,仅从与肺泡表面活性物质功能有关的几个问题,作一粗浅的介绍。一、肺泡的超微结构: Lowe 及其他一些学者的电子显微镜研究表明,肺泡是由两种连续的上皮细胞(即Ⅰ
In recent years, the alveolar structure of the electron microscopy study further revealed the normal lung structure and pathological changes. It has been shown that there is a layer of acellular continuous layer inside the normal alveoli called Sur-factant, alveolar surface tension active substance or surfactant. This active substance has important biological significance for maintaining the stability between alveoli. This article based on the literature, only from the alveolar surface-active substances and several issues related to a superficial introduction. First, the ultrastructure of alveoli: Lowe and other scholars electron microscopy studies have shown that the alveoli are composed of two kinds of continuous epithelial cells (ie Ⅰ