Question

29.How are dust particles prevented from entering the lungs?​

Answer 1

Tiny hairs called cilia (pronounced: SIL-ee-uh) protect the nasal passageways and other parts of the respiratory tract, filtering out dust and other particles that enter the nose through the breathed air.

Answer 2

The hair and mucus present in our nose prevents the dust particles from entering the lungs. There are tiny hair present in the nasal cavity along with mucus which prevent dust particles to enter the lungs and clean air goes inside the lungs.

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