Skeleton of the Swan

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“The external air penetrates into every part of their body by the respiratory tubes, which ramify the whole cellular tissue. Wings alone would fail to support the bird.”

Galleries

Bird Anatomy

Source

Hazlitt Alva Cuppy PH.D., Editor Beauties and Wonders of Land and Sea (Springfield, OH: Mast, Crowell & Kirkpatrick, 1895)

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