We sneeze primarily to expel irritants from our nasal passages and protect the respiratory system.
It is an involuntary reflex reaction.
Now I am going to explain what happens when an irritant enters our nasal passage !!!
1. When irritant enter our nostrils, they interact with tiny hair and sensitive skin.
2. This irritation stimulates the nerve, which sends an electrical signal to " sneeze center " of our brain stem.
3. Brain coordinates a massive muscular response.
Eyes shut.
Tongue moves to roof of the mouth.
Chest muscles brace.
4. Diaphragm contracts
Air is forcefully expelled through nose.
Speed of air can reach upto 100mph !!!!
5. Finally irritation is cleared.
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