This is a statement not a question
Answer:
D. all of the above
Explanation:
The trachea is lined up with the cilia, which sweeps fluids and foreign particles out of the airway
Cilia are complex structures of the paranasal sinus in which its function is critical to respiratory defense.
Further back in your nose are even smaller hairs called Cilia.
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Answer:
a
Explanation:
i'm pretty sure its a because it all makes sense