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Illustration: The Respiratory System Of A Bird. Air Sacs And Lungs

ID 241550346 © Aldonagriskeviciene | Megapixl.com

The avian respiratory system is different from that of other vertebrates, with birds having relatively small lungs plus air sacs that play an important role in respiration but are not directly involved in the exchange of gases. The air sacs permit a unidirectional flow of air through the lungs.

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The Respiratory System of a Bird. Air sacs and Lungs

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