How does human smell work?

Find out how the human nose detects and identifies different smells.

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.