Question

Give reason birds have pneumatic hollow boxes

Answer 1

Some birds do not have as manypneumatic bones. Birds have light weighted bones with internal spaces filled with air. These bones are calledpneumatic bones. This feature reduces the corporal density of the animal facilitating the flight.

Answer 2

The primary reason birds can fly is because their bones are hollow. You might think that this means that their bones are lighter. ... This is the fact that many birds have something called struts and trusses inside their bones to give them the strength that they need. This means that birds' bones have air sacs in them too