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Ultrastructure of the oviduct of the lung fluke, paragonimus ohirai (Trematoda: Troglotrematidae)
Author(s) -
Orido Yasuhide
Publication year - 1990
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1052040303
Subject(s) - oviduct , biology , basal lamina , ultrastructure , anatomy , golgi apparatus , cilium , trematoda , basal body , viral tegument , organelle , epithelium , ampulla , cytoplasm , microbiology and biotechnology , flagellum , endoplasmic reticulum , helminths , zoology , biochemistry , genetics , virology , gene , endocrinology
The oviduct of Paragonimus ohirai is lined by an epithelium composed of cells that rest on a prominent basal lamina and exhibit extensive basal infoldings. Apical surfaces of the epithelial cells are lamellated, and height and abundance of lamellae vary in different regions. Cilia are confined to two separate areas and are variable with respect to their axonemal pattern. There are five principal regions of the oviduct: infundibular (IR), distal ciliary (DCR), preseminal receptacle (PSR), proximal ciliary (PCR), and junctional (JR). The pattern of organization of cytoplasmic organelles such as mitochondria, Golgi complexes, and lysosomes is distinctive within each region. The remainder of the wall consists of circularly arranged myofiber bundles, together with a plexus of nerve fibers. The structure of the oviduct in relation to passage of oocytes, movement of spermatozoa, and fertilization is discussed.