How does human smell work?
Smell - key words
Odour molecule - A tiny chemical particle that we detect as a particular smell
Nostril - One of the two openings in the nose that we breathe and smell through
Sense receptors - Cells that respond to something by sending messages to the brain
Mucus - Slippery, sticky substance that protects the body, for example snot in your nose
Nerves - Cells that carry messages between the brain and the rest of the body