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Q&A Gas-based circulatory system?

I'm making a species which has a gas-based circulatory system. How would one go about designing such a system, in which liquid blood is replaced by some kind of gas? What kind of blood vessels wou...

3 answers  ·  posted 8y ago by ArborianSerpent‭  ·  last activity 8y ago by ArborianSerpent‭

Question biology xenobiology anatomy