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Q&A Would an animal with a sail like respiratory system be possible?

Imagine a terrestrial creature with a sail on its back, like a Spinosaurus or Dimetrodon. Would it be possible to use this sail as a lung for oxygen exchange with the air?

4 answers  ·  posted 7y ago by Yens Gathercole‭  ·  last activity 7y ago by Yens Gathercole‭

Question reality-check creature-design