Question

The organ by birds during flying

Answer 1

Answer:

Organ Systems Adapted for Flight

Birds have light-weight bones that are filled with air. They also lack a jaw, which in many vertebrates is a dense, heavy bone with many teeth. Instead, birds have a light-weight keratin beak without teeth. ... They also have an organ called a gizzard that contains swallowed stones.

Answer 2

Answer:

Bird organ systems are adapted for flight. For example, they have light-weight air-filled bones and a large four-chambered heart. Birds also have relatively large brains and a high level of intelligence.

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