Question

Explain why respiration through mouth is harmful mention the specific feature of muscle respiration that makes it a safer process

Answer 1

because when we respire through our mouth it allows the dust particles in the air to enter direct in our lungs and stomach which can be harmful.
But when we respire through our nose the dust particles in the air get trapped in the nose hairs and in the mucus present in our nose .

so we should respire through our nose