Brunanská M
Parasitological Institute, Slovak Academy of Sciences, Kosice, Slovak Republic. brunan@linux 1.saske.sk
Folia Parasitol (Praha). 1997;44(1):55-61.
The fine structure of the oviduct, oviduct-uterine junction and uterus of the nematode Toxocara canis (Werner, 1782) is described. Columnar-type epithelioid cells with numerous microvilli at the apical membrane border the oviduct lumen. Many electron dense secretory products are present in these cells. The cells lining the oviduct-uterine junction have no microvilli. They are coated with an electron-dense layer and contain numerous membrane-bound dense material containing bodies. Externally, the cells are surrounded by a basal lamina and muscle cells. The epithelial cells lining the greater part of the paired uteri appear to be rather flat. The oocytes inside the oviduct are covered with a dense thick plasma membrane and contain lipid droplets, dense granules and glycogen. The morphology of the oocytes before the fertilization inside the oviduct-uterine junction resembles that of the oocyte in the oviduct. After the fertilization the egg shell formation takes place. The egg shell of T.canis is composed of four layers: uterine, vitelline, middle chitinous and inner layer. The differences between the fine structure of the egg shell of T. canis and other related nematodes are discussed.
描述了犬弓首线虫（Werner，1782）输卵管、输卵管-子宫连接处和子宫的精细结构。输卵管管腔内衬有柱状上皮样细胞，其顶端膜有许多微绒毛。这些细胞中有许多电子致密的分泌产物。输卵管-子宫连接处的细胞没有微绒毛。它们被一层电子致密层覆盖，并含有许多膜结合的致密物质包含体。在外部，这些细胞被基膜和肌肉细胞包围。成对子宫大部分内衬的上皮细胞似乎相当扁平。输卵管内的卵母细胞覆盖着一层致密的厚质膜，含有脂滴、致密颗粒和糖原。输卵管-子宫连接处受精前卵母细胞的形态与输卵管中卵母细胞的形态相似。受精后发生卵壳形成。犬弓首线虫的卵壳由四层组成：子宫层、卵黄层、中间几丁质层和内层。讨论了犬弓首线虫卵壳精细结构与其他相关线虫之间的差异。
