Linked from
The 12 pages that link to Trachea, each with the reason it gives.
LarynxRelated: It continues the airway immediately below the larynx.
Nasal cavityRelated: It lies farther along the respiratory route that begins at the nasal cavity.
SyrinxRelated: The trachea ends at the branching point where the syrinx is located.
Cough reflexRelated: Its sensory lining can trigger coughing when irritated.