Question

(iii) organ by birds during flying? ​

Answer 1

Answer:

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 light weight keratin beak without teeth. They also have an organ called a gizzard that contains swallowed Stone.

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Answer 2

Explanation:

Muscles and organs. The cardiac (heart) muscles and smooth muscles of the viscera of birds resemble those of reptiles and mammals. ... Two pairs of large muscles move the wings in flight: the pectoralis, which lowers the wing, and the supracoracoideus, which raises it.

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