Question

Air sacs and pneumatic bones are seen in ______​

Answer 1

Birds, they have specialized bones that are pneumatic because they are full of air sacs that provide a continuous flow of breath throughout their bodies.

Answer 2

Answer:

Birds have remarkably specialized bones that are pneumatic, because they are full of air sacs that provide a continuous flow of breath throughout their bodies. In short, their lungs are essentially hooked up to their bones.