The Amphibia bridge the phyletic gap between the fishes and terrestrial tetrapod vertebrates. This transition has involved considerable osmoregulatory, as well as respiratory, change so that water and salt metabolism may be expected to be particularly varied and interesting. For both these reasons, and the relatively free liaison between physiologists and amphibians, the group has received considerable scientific attention.
KeywordsUrinary Bladder Xenopus Laevis Cane Toad Tiger Salamander Rana Esculenta
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