Page 66 - How It Works - Book Of Amazing Answers To Curious Questions, Volume 05-15
P. 66

Are there






                more                                  than                               five






             human                                               senses?







                                Discover the ten senses you never knew you had



































               he five classic human senses get all of the   enabling you to eat without having to closely   As your stomach starts to fill up, stretch
               attention, so it might surprise you to know   watch what you are doing. In order to stay   sensors feed back to the brain, turning down the
         Tthat there are several more senses   balanced as you reach across the table, sensory   signals that are telling you to keep eating, and
          working away quietly in the background in your   information is quietly gathered by specialist   when the part-digested food starts to hit your
          body. Take something as simple as sitting down   structures in the inner ear.   small intestine, sensors trigger the production of
          to eat your dinner. All five senses are active,   Once the food has reached and is inside your   a hormone that flicks the switch to tell you that
          taking in the sight and smell of the food on your   mouth, one set of sensors provide information   you have had enough. The build-up of waste
          plate, the taste and feel as you put it into your   about the temperature, and another set of   products is also closely monitored and long after
          mouth, and the sound as you chew. But without   specialist nerves called nociceptors quickly alert   your meal has been completed, sensors will alert
          your other senses, the experience of eating that   you as to whether the mouthful is dangerously   you when it is time to get rid of anything that is
          meal would not be the same.          hot or particularly cold. At the same time, the   left over.
           The act of sitting at the table and getting the   blood and the fluid surrounding your central   So while the traditional five senses are the
          food from the plate to your mouth is a sensory   nervous system are monitored to make sure that   ones that we rely on most in our conscious
          feat. You can’t keep an eye on your limbs all the   levels of carbon dioxide and oxygen remain   interactions with the world around us, there are
          time, so the positions of your joints and the   within normal limits, and your breathing rate is   several more that work quietly in the background
          tension in your muscles is constantly measured,   subconsciously adjusted.   as we go about our daily lives.


          66       How It Works
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