Multiple choice

What prevents dust particles from getting into the respiratory system?

  1. Fine hair and mucus in the nose

  2. The air pipe in the nose is very thin

  3. There are bends in the air way in the nose

  4. The skin inside the nose acts as dust conditioner

  5. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Correct. Fine hair and mucus are present inside the nose to prevent dust particles from getting into the respiratory system.

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