If you mean "light" as in "the opposite of being heavy", then:
Bird bones are hollow. Well, not completely, but if you look at the structures they are not as "filled up" as, say, human bones.
bird bones are hollow. that is why they are light
Bird bones are light because they are hollow.
It makes Keel which is boat shaped that reduces friction in flight and flight muscles are attached to it.
Eagles are birds and have a spine (back bone).
scapula
Compact bone.
Rovio makes Angry Birds.
A honeycomb bone in birds helps to reduce weight while maintaining strength and stiffness for flight. It is a unique bone structure found in some bird species that provides a balance between strength and lightness, essential for flying.
Osteoblast makes new bone tissue
Osteoblast makes new bone tissue
i reckon it would be a rib bone or a flipper bone as they woul;d be the largest parts on the animal
it makes your bone grow good and strong!