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Does a frog have one or two lungs?


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August 03, 2012 8:24AM

Frogs and toads, like most vertebrates have two lungs. Frogs and toads also exchange oxygen and carbon dioxide straight to and from the blood via their skin, which (unlike ours) is permeable. So they actually have quite small and simple lungs for vertebrates, frogs that live in drier environments will have bigger lungs (as they can't rely so much on respiration through the skin) as frogs that live in wet environments.