1. Certain chemical particles present in the air circulate the smells in the air. For example, flowers, food, and perfumes release chemicals into the air.
2. When these chemical particles enter the nasal cavity, they dissolve the mucous lining that coats the smell receptors in the nasal cavity.
3. The dissolved chemicals particles stimulate the smell receptors
4. The smell receptors then send out nerve impulses to the brain. The brains identifies the smell.
5. Structural adaptations of the nose to detect smells:
a) Smell receptors are located at the root of nasal cavity. This enables the receptors to have
maximum exposure to the air that enters the nasal cavity.
b) The smells receptors are always covered in moist muscus which is secreted by the glands in
the nasal cavity.
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