氣管
氣管（trachea）是連接喉部以及肺部的通道，腹側由軟骨環組成，背側由平滑肌所組成，向上以聲帶為出口，向下分支稱之為支氣管（bronchus）。组成气管的软骨为透明软骨。
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Template:Lower respiratory system anatomy
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