Clipart tagged: ‘bird airway’

"a, an inch of trachea, contracted to the utmost, the rings looking like alternating half-rings; b, the same, stretched to two inches, the rings evidently complete, with intervening membrane." Elliot Coues, 1884

Bird Trachea

"a, an inch of trachea, contracted to the utmost, the rings looking like alternating half-rings; b,…

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