Question

Why do we often sneeze when we inhale a lot of dust laden air?​

Answer 1

Answers

We often sneeze when we inhale a lot of dust-laden air to expel out these foreign particles. These particles get past the hair in the nasal cavity and irritate the lining of the cavity which  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.

Answer 2

The air around us has various types of unwanted particles such as smok, dust,Pollen etc. when we inhale the particles get trapped in the hair present in our nasal cavity.However,sometimes this particles may get past the hair in the nasal cavity then they irritate the lining of the cavity as a result of which we Sneeze.Sneezing expels this foreign particles from the inhaled air and a dust-free, clean air enters in ours body.