Koval'chuk L E, Likhacheva L M
Arkh Anat Gistol Embriol. 1990 Aug;99(8):69-74.
By means of light (semithin slices) and electron microscopes structural organization of the corpuscle and glomerulus of the capsule has been studied in freshwater fishes--carp (Cyprinus carpio) and crucian carp (Carassius carassius). The diameter of their glomeruli are in the carp from 80.8 +/- 1.4 mcm up to 59.8 +/- 2.4 mcm and in the crucian carp--from 86.4 +/- 1.8 mcm up to 69.25 +/- 0.2 mcm. Between these dimensions there are significant differences. Components of the external wall of the capsule in the fishes studied have similar structure. In epitheliocytes, situating on the basement membrane, electron opaque inclusions have been revealed. They resemble, by their ultrastructure, granules of peripolar cells, described in mammals and in man. In places, where epitheliocytes have contacts, thin folds are formed, they turn into the capsule lumen. Touching the cell surface, they can form border vacuoles. The main peculiarity of endotheliocytes in the glomerular capillaries is presence of diaphragmated and open fenestrae (their size is from 30 to 50 nm) in the peripheral zone of their cytoplasm. Unlike the higher vertebrates, the fishes have a well developed pericapillary mesangium. It contains mesangial matrix and rare processes of mesangiocytes.
借助光学显微镜（半薄切片）和电子显微镜，对淡水鱼——鲤鱼（Cyprinus carpio）和鲫鱼（Carassius carassius）的肾小体和肾小球囊的结构组织进行了研究。鲤鱼肾小球的直径为80.8±1.4微米至59.8±2.4微米，鲫鱼肾小球的直径为86.4±1.8微米至69.25±0.2微米。在这些尺寸之间存在显著差异。所研究鱼类的肾小球囊外壁成分具有相似的结构。在位于基底膜上的上皮细胞中，发现了电子不透明的内含物。就其超微结构而言，它们类似于在哺乳动物和人类中描述的极周细胞颗粒。在上皮细胞相互接触的部位，形成了薄褶皱，这些褶皱延伸至肾小球囊腔。接触细胞表面时，它们可形成边缘空泡。肾小球毛细血管内皮细胞的主要特点是在其细胞质外周区域存在有隔膜的和开放的窗孔（其大小为30至50纳米）。与高等脊椎动物不同，鱼类有发育良好的球旁系膜。它包含系膜基质和稀少的系膜细胞突起。
