Question

Air contains dust particles. Where do these particles come from? Do they enter in
our body when we breathe in air?​

Answer 1

Answer:

They can enter our body when we breathe through mouth but when we breathe through nose the hair present in nose trap the dust particles and unable to enter to our body

So, we should breathe through nose

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Answer 2

Answer:

Dust enters our lungs in the same way that other gases do. One of the the vital processes we need to survive is breathing. ... When inhalation takes place, air containing gases and dust particles gushes in through the nasal chambers. At this stage, the largest particles are trapped by our nasal hair and mucus.