Why do we sneeze?
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Sneezing
is our body's way of removing an irritation from our nose.
The irritation could be dust, pollen, pet hair and
other allergens.
Some people sneeze when they're exposed to cold air –
this is because the inside of the nasal cavity becomes swollen and more
sensitive than usual.
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Muscles involved
in sneezing: the abdominal (belly) muscles, the chest muscles, the diaphragm
(the large muscle beneath our lungs that makes us breathe), the muscles that
control our vocal cords, muscles in the back of our throat, and the eyelid
muscles.
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How?
The muscles in the chest expand, the diaphragm
contracts, and the lungs fill with air. The muscles that are in the back of
the throat and vocal cords also contract, and then the stomach and chest
muscles follow suit.
Finally, the sneeze is expelled through the mouth,
sending between 2,000 and 5,000 droplets of mucus and air flying away from
the body at between 112.6 and 160
kph.
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The spray from a sneeze can extend 152.4 centimeters
from the sneezer This spray is made up of saliva and mucus. Expelling the
mixture through the mouth clears the nasal cavity.
Images courtesy of:
- speechbuddy.com
- alhomeremedies.blogspot
- photobucket.com
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