This page contains polls dedicated to How does the sense of smell work?.
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The sense of smell is probably the oldest of our five senses. As you breathe in, air passes through a cavity behind the nose.

It contains patches of millions of smell receptors called olfactory cells. Sensory hairs stick out from the surface of these receptor cells.

The hairs detect smells and pass information along nerve fibres to the brain. Substances that you recognize as having an odour dissolve in the layer of mucus covering the sensory cells, stimulating them to produce a signal.

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Tags: cells, smell, sense

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