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Which statement accurately describes a key function of the trachea in the respiratory system?.
- A.It is the primary site for gaseous exchange within the lungs.
- B.It warms, humidifies, and filters incoming air before it reaches the lungs.
- C.It transports oxygenated blood from the lungs back to the heart.
- D.It acts as a muscular pump to aid in the movement of air.
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