Iela L, Rastogi R K
Basic Appl Histochem. 1979;23(3):221-33.
On the basis of histological and histochemical characteristics the oviduct of adult Bufo vulgaris can be separated into six zones. These characteristics include mainly the relative abundance of secretory and ciliated epithelial cells, mucosal foldings, tubular glands and the staining properties of the secretory elements. The VI zone (uterine segment) is totally deprived of tubular glands and is profoundly rich in epithelial secretory cells. These cells and the tubular glands, when well-developed, are rich in neutral and acid mucins in the preovulatory phase, whereas this content is greatly diminished after ovulation. Similarly, the weight and the length of the oviduct displays a marked seasonal pattern. The same is observed for its protein content and acid and alkaline phosphatases. These parameters show the highest values in the preovulatory period and lowest after ovulation. The toad oviduct also displays marked hydroxysteroid dehydrogenase activity along the mucosal epithelium. Its functional significance remains a matter of debate, however. A marked parallelism between the present data and those obtained by others in other amphibians indicates the existence of a common pattern of seasonal modifications correlated mainly with the release of the eggs and the formation of their multi-layered coat.
根据组织学和组织化学特征，成年中华大蟾蜍的输卵管可分为六个区域。这些特征主要包括分泌性和纤毛上皮细胞的相对丰度、黏膜褶皱、管状腺体以及分泌成分的染色特性。第六区（子宫段）完全没有管状腺体，富含上皮分泌细胞。这些细胞和管状腺体在排卵前期发育良好时，富含中性和酸性粘蛋白，而排卵后这种含量会大幅减少。同样，输卵管的重量和长度呈现出明显的季节性模式。其蛋白质含量以及酸性和碱性磷酸酶也有相同的情况。这些参数在排卵前期显示出最高值，排卵后最低。蟾蜍输卵管沿黏膜上皮也表现出明显的羟类固醇脱氢酶活性。然而，其功能意义仍存在争议。目前的数据与其他研究人员在其他两栖动物中获得的数据之间存在明显的平行关系，这表明存在一种主要与卵子释放及其多层包膜形成相关的季节性变化的共同模式。
