1. The Senses – The Nose

2. How does it work? https://www.youtube.com/watch?v=snJnO6OpjCs
Nose Blind = Sensory Adaptation

3. The Nose - Smell
Besides filtering, warming and humidifying air the nose’s other job is as an olfactory (smell) organ.
The top of the nose is formed by 2 bones – nasal bones
The end of the nose is made of cartilage

5. The Nose - Smell
The olfactory (smell) area is located in the top of the nasal cavity
This area has specialized nerve cells that detect odours called the olfactory bulb
The nose can detect about 10k different odours
The info is sent directly to the brain

7. Smelling
For a substance to be perceived by the nose 4 conditions must be met:
It must be odoriferous, of a chemical nature that stimulates the smell receptor cells
It must be volatile (gaseous), transported by the air
It must be in a sufficient concentration to stimulate receptor cells
It must come into contact with the receptor cells (not blocked by mucus)