Question

what will happen if dust particles and germs are not trapped by hair and mucus?​

Answer 1

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Here is you answer :

If the hair present inside our nose will not trap the dust particles and germs, they will enter into our respiratory tract, and then the lungs, making it difficult to breathe.

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Answer 2

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: - The mucus catches particles that have been inhaled, and the cilia move the particles toward the pharynx. The end of the trachea divides into two bronchi that enter the right and left lung. Air enters the lungs through the primary bronchi.

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