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Home Q & A Board Biology-Related Homework Help Zoology and Botany (Moderator: ehd123)
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Jermain_ Jermain_
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10 years ago

 
Bird lungs are efficient because of   
A)
 
their large size.   
B)
 
unidirectional and continuous air flow.   
C)
 
countercurrent blood flow.   
D)
 
capacity for discontinuous ventilation.   
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padrepadre
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10 years ago
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Jermain_ Author
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#2
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10 years ago
Excellent answer, thank you padre.
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