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You smell as a method to determine the quality of what you may smell. We used this as a tool to stray away from foods or substance that may harm us and towards ones that will not. This is determined mostly by things commonly found, making your nose give a generalized reaction to all things that smell like it so this means if something smells bad its not always bad for you but may relate to something bad for you in some way.

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10y ago
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14y ago

The Olfactory Nerve.

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Q: What determines the sense of smell?
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