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The development, growth and degeneration of the pronephric system in anuran amphibians of Iraq

Authors


  • *This work was carried out during the stay of the first author at Mosul University, Iraq.

Abstract

The growth and degeneration of the pronephric system were examined at different larval and metamorphic stages in Bufo viridis viridis, Hyla arborea savignyi and Rana ridibunda ridibunda. It was found that the process of degeneration is sequentially similar to that of differentiation being in a cranio-caudal order in the last two genera, but in the opposite direction in the genus Bufo. It is concluded that in these genera pronephric degeneration is closely related to the histology of the thyroid glands.

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