John E. Michaels, Patricia A. Brown (2010) CIL:9302, Rana catesbeiana, barrier epithelial cell. CIL. Dataset

This group of micrographs illustrate the ultrastructural characteristics of the middle layer of the three meningeal layers that cover the central nervous system The arachnoid cells contain abundant intermediate filaments that occupy a substantial volume of the cytoplasm. In some cells the intermediate filaments are organized into numerous coils of relatively uniform size and lie parallel to the outer surface of the central nervous system, such that sections cut tangential to the membrane surface (see CIL:9301) show the spirals but transverse sections such as this one do not. The plasma membrane of these cells has many caveolae. Adjacent arachnoid cells are connected by large desmosomes.

Images were recorded using a Philips EM301 TEM at 80 kv. Original glass plates were scanned and digitized using an Epson V750 flatbed scanner with a step size of 15 micrometers.

This group of images complement those published in the reference below.

Reference: Michaels, JE, Tornheim, PA. Cell Tissue Res. 236:693-697 (1984).

本组显微照片展示了覆盖中枢神经系统的三层脑膜中层超微结构特征。蛛网膜细胞内含有丰富的中间丝，占据了细胞质的大量体积。在某些细胞中，中间丝组织成许多大小相对均匀的螺旋，平行于中枢神经系统的外表面，因此切面垂直于膜表面（参见CIL:9301）可显示出螺旋状结构，而如本例所示的横切面则不然。这些细胞的质膜上存在许多小窝。相邻的蛛网膜细胞通过大型桥粒相连接。图像使用Philips EM301透射电子显微镜以80千伏电压进行记录。原始玻璃板使用Epson V750平板扫描仪进行扫描和数字化处理，步进距离为15微米。本组图像补充了以下参考文献中发表的图像。参考文献：Michaels, JE, Tornheim, PA. Cell Tissue Res. 236:693-697 (1984).