A STUDY OF THE FINE STRUCTURE OF CILIATED EPITHELIA
A STUDY OF THE FINE STRUCTURE OF CILIATED EPITHELIA
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DOI：
10.1002/jmor.1050940202
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发表时间：
1954-01-01
影响因子：
1.5
通讯作者：
PORTER, KR
中科院分区：
文献类型：
--
作者：
FAWCETT, DW;PORTER, KR
在这项研究中，纤毛上皮薄切片从板鳃类，两栖类和哺乳动物进行了检查，电子显微镜。在这一范围内的动物形式，纤毛表现出相同的内部结构，由11个纵向细丝嵌入在一个均匀的矩阵和封闭在细胞膜的延伸。在横截面中，2根长丝的切割端位于中心，另外9根长丝围绕它们均匀地间隔成圆。在软体动物和两栖动物中，这些纤维终止于纤毛的基部，纤毛的基部有明显的横板;在哺乳动物中，它们似乎继续延伸到基底小体。基底小体的形状不对称，它们的方向似乎与纤毛搏动的方向有恒定的关系。在板鳃类中，每个基小体上有2个发育良好的细根，在两栖类中，细根是单个的，并且更小，在哺乳动物中，它们是不发达的。睫状根首次被证明有一个规则的横纹。这些纤维在周期性和周期内结构上与前面描述的各种类型的细胞内和细胞外纤维不同。电子显微照片来说明这些细节的精细结构和纤毛上皮细胞的其他功能。
In this study thin sections of ciliated epithelia from lamellibranchs, amphibians and mammals were examined by electron microscopy. Throughout this range of animal forms, cilia exhibited the same internal structure consisting of 11 longitudinal filaments embedded in a homogeneous matrix and enclosed in an extension of the cell membrane. In cross section the cut ends of 2 of the filaments are situated in the center and the other 9 are evenly spaced in a circle around them. In mollusks and amphibians these filaments end at the base of the cilium which is marked by a distinct transverse plate; in mammals they seem to continue into the basal corpuscle. The basal corpuscles are asymmetrical in shape, and their orienta-tion appears to bear a constant relation to the direction of ciliary beat. In lamellibranchs 2 well-developed rootlets arise from each basal corpuscle, in amphibia the rootlets are single and smaller, and in mammals they are rudimentary. The ciliary rootlets are demonstrated for the first time to have a regular cross striation. These fibers differ in periodicity and in their intraperiod structure from the various types of intra- and extracellular fibers descr. before. Electron micrographs are presented to illustrate these details of fine structure and other features of ciliated epithelia.