Swim bladder trachea - Swim bladder trachea

…Air entering and leaving the “lungs” is conducted by tubes branching from the pharynx, at the bifurcation of which there is a specialized opening and closing device, like the larynx. The structure of this respiratory passage is very similar to that of tetrapods, but because this system lacks cartilaginous elements, the tube that conducts the air is usually considered a “airway” (or swim bladder trachea), as in the swim bladder. The larynx originally appeared as a device to prevent food and water from entering the respiratory passage, and its specialized cartilaginous skeleton is derived from the visceral arch (gill skeleton). …

*Some of the terminology that refers to "swimming bladder trachea" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…その〈肺〉に出入する空気は咽頭から分岐した管で導かれ，その分岐部には喉頭のような特殊な開閉装置がある。この呼吸道の構造は四足動物のそれによく似ているが，この系には軟骨性の要素がないため空気を導くその管は，うきぶくろの場合と同じく〈気道〉(またはうきぶくろ気管)と見なすのが普通である。喉頭はもともと食物や水が呼吸道に入りこむのを防ぐ装置として現れたもので，そこにある特殊な軟骨性骨格は内臓弓(えらの骨格)に由来する。…

※「うきぶくろ気管」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報