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m_a_m_a [10]
3 years ago
7

What is the function of the air sacs in the respiratory system of birds??

Biology
1 answer:
Hunter-Best [27]3 years ago
3 0
"<span>The </span>air sacs<span> permit a unidirectional flow of </span>air through the lungs," -<span>http://people.eku.edu/ritchisong/birdrespiration.html</span>  
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