Question

9.
Why do we often sneeze when we inhale dust-laiden air?​

Answer 1

Answer:

Answer: When we inhale air containingdust particles, the particles get trapped in the hair present in out nostrils. Sometimes, these particles may pass through the hair and enter the nasal cavity. ... Sneezing expels the foreign particles from the inhaled airand dust-free clean air enters our body.

Explanation:

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Answer 2

Explanation:

When dust particles enter our nostril, it triggers a message to the brain. The brain instructs the nasal chamber to initiate sneezing. This is a method to remove the unwanted dust particles from the nostrils. Sneezing is a type of defense mechanism used by our body.

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