Why do things smell?

More importantly, though, why does the How It Works team always smell so great? Must be all that knowledge we’ve got stored up

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Why do things smell?

Smell is caused by the detection of volatilised chemical compounds (evaporated molecules) in the atmosphere, either organic or non-organic, by neurons located in the olfactory epithelium, a small patch of tissue located at the back of human nasal cavities. The olfactory epithelium’s receptor neurons act as sensory signalling cells, initialising electric signals when odour is detected. When a threshold of stimulus is reached, the signals send that information to the olfactory bulb and cortex – part of the human limbic system (a set of brain structures that form the inner border of the brain cortex) – for processing. The odour is then deciphered, storing and matching the information of the volatilised chemical compounds with other known odours and past experiences.

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  • Warren

    Mendelevium is element 101, 107 is bohrium.

  • http://www.howitworksdaily.com Jonny O’Callaghan

    Apologies Warren, this has been changed.

    Jonny O’Callaghan
    Staff Writer