na2neErikam5painez
na2neErikam5painez
21-12-2016
Biology
contestada
Why do birds have hallow bones?
Respuesta :
greenacres
greenacres
21-12-2016
The hollow
part of a
bird bone
isn't wasted space. In some
bones
, the
hollow
cavities contain extensions of the air sacs from the lungs. These air sacs help the
bird
to get the oxygen it needs to fly quickly and easily.
Answer Link
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