why are large cutaneous veins present in amphibians
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The skin of amphibians contains a unique vasculature that facilitates oxygen (O2) uptake and carbon dioxide (CO2) excretion. Cutaneous gas exchange can fulfill routinely 0% to 100% of O2 uptake and 20% to 100% of CO2 excretion (1). ... Thus, amphibians are, for the most part, tied to an aquatic or semiaquatic life
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