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When you and I take a deep breath, we pull air into our lungs. That’s because humans are mammals. But fish aren’t mammals. They usually don’t breathe air. They usually don’t have lungs. That’s what I ...
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Do fish breathe oxygen like humans?
All living organisms have to breathe, exchanging oxygen and carbon dioxide with the environment. How do fish do it without lungs? This viewer question comes from Zambia. Actors Who Permanently Damaged ...
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