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How Do Penguins Breathe -- aka “Do Penguins Have Gills?” | Penguins International
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![PDF] Penguin lungs and air sacs: implications for baroprotection, oxygen stores and buoyancy | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/19bc271d83b38c616e6dc79e241f37f724c1837e/3-Figure1-1.png "PDF] Penguin lungs and air sacs: implications for baroprotection, oxygen stores and buoyancy | Semantic Scholar")