How does human smell work?
How does it work?
Smells enter the nose when we breathe in.
A patch of skin with mucus (snot) at the back of the nose traps these smells.
The skin sends different messages to the brain depending on what the smell is like.
The brain then uses these messages to work out what we are smelling!
Why do we have mucus (snot)?
It helps us to smell.
It protects the body from germs.