We often sneeze when we inhale a lot of dust-laden air. What can be possible explanations for this? Class 7

We often sneeze when we inhale a lot of dust-laden air. What can be possible explanations for this? Class 7

We often sneeze when we inhale a lot of dust-laden air. What can be possible explanations for this? Class 7

Answer:

When we inhale a lot of dust-laden air, the dust particles get trapped in the hair of our nasal cavity. These particles irritate the inside lining of the nasal cavity and we sneeze to expel these dust particles. Sneezing helps a dust-free, clean air to enter in our body.