Kober H J
Z Mikrosk Anat Forsch. 1975;89(3):399-409.
To complete the hitherto existing results about the trachea epithelium, the scanning electron microscope was used to get representative statements about the apical surface of the epithelium: First of all the epithelium consists of undifferentiated round cells with cytopodia. The cells rarely carry single cilia at the same time. At the 18. day of pregnancy nearly all of the cells have a single cilium. Until the end of the intrauterine phase the single cilia are retracted again. At the 20. day ciliated cells and cells with protrusions are formed. Mucus granula are secreted into the lumen already before birth. Immediately post partum much mucus appears. Its distribution, viscosity and optical behaviour is different. For ciliated cells and goblet cells no special characteristical distribution was noticed. The building of the cells surface was detailed discussed. The question about function of the single cilia cannot yet be answered.
为完善迄今有关气管上皮的研究结果，使用扫描电子显微镜获取上皮顶端表面的代表性描述：首先，上皮由带有胞质突的未分化圆形细胞组成。这些细胞很少同时带有单个纤毛。在妊娠第18天，几乎所有细胞都有单个纤毛。直到子宫内阶段结束，单个纤毛又缩回。在第20天，形成了纤毛细胞和有突起的细胞。黏液颗粒在出生前就已分泌到管腔中。产后立即出现大量黏液。其分布、黏度和光学特性各不相同。对于纤毛细胞和杯状细胞，未观察到特殊的特征性分布。详细讨论了细胞表面的结构。关于单个纤毛的功能问题尚未得到解答。
