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Learn about the unique respiratory system of birds in this video from Irtisam's Biology Class 11. Discover how birds breathe and how their respiratory system differs from mammals.
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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