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