Ultrastructure of the vasa deferentia of Terrobittacus implicatus and Cerapanorpa nanwutaina (Insecta: Mecoptera)
Autor: | Bao-Zhen Hua, Qi-Hui Lyu |
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Rok vydání: | 2019 |
Předmět: |
Male
0106 biological sciences 0301 basic medicine Insecta Mecoptera Panorpidae Plant Science Merocrine Genitalia Male 01 natural sciences 03 medical and health sciences Vas Deferens Microscopy Electron Transmission medicine Animals Cuticle (hair) biology urogenital system Chemistry Vas deferens Cell Biology General Medicine Anatomy biology.organism_classification Epithelium 030104 developmental biology medicine.anatomical_structure Ultrastructure Basal lamina 010606 plant biology & botany |
Zdroj: | Protoplasma. 256:883-891 |
ISSN: | 1615-6102 0033-183X |
Popis: | The fine structures of vasa deferentia and postvesicular vasa deferentia were investigated in the hangingfly Terrobittacus implicatus (Cai et al. 2006) and the scorpionfly Cerapanorpa nanwutaina (Chou 1981) using light and transmission electron microscopy, and schematic diagrams were drawn accordingly. The vasa deferentia of both species comprise muscular layers, a basal lamina, and a mono-layered epithelium, but the postvesicular vasa deferentia contain muscular layers, a basal lamina, a single-layered epithelium, a subcuticular cavity, and an inner cuticle respectively. The vas deferens releases secretions into the lumen directly, probably by means of merocrine production. On the contrary, the cells of the postvesicular vas deferens correspond to class I glandular cells, discharging secretions into the subcuticular cavity first, and then into the lumen through an inner cuticle. The epithelium in both structures of Bittacidae is well developed and contains more microvilli, organelles, and more types of secretions than in Panorpidae. In Panorpidae, the spine of the postvesicular vas deferens may serve as a barricade for the reflow of the sperm and to protect the extraordinarily long structure from being collapsed or injured. |
Databáze: | OpenAIRE |
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