Question

wby do birds have. hollow bones class 9 science​

Answer 1

$\huge \mathfrak \purple{Hello \: }$

Bird bones aren't just hollow — they're pneumatized. That is, they're full of spaces for air. (You have some pneumatized bones, too, mostly around your sinuses).

Answer 2

Answer:

Hollow bones are also called pneumatized bones, meaning they're filled with space for air. It is thought that this structure helps with oxygen intake during flight. Air sacs are attached to the hollow areas in a bird's bones. ... This helps birds take in oxygen while both inhaling and exhaling.

Explanation:

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