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ORCHIDS The International School

Sense Organ

1.Why Do We Sneeze?

  • When the hairs in the nose trap any dust or germs, the brain acts and commands our body to sneeze.
  • This way, the body does not allow unwanted substances to enter our body through the respiratory passage.
 

 

2.Why Do We See the Spot in Our Eyes Constrict or Expand?

  • The central part of our eye, which appears like a small black spot called the pupil, regulates the entry of light into the eyes.
  • When the light is too dim, the pupil expands and constricts when it is too bright.
 

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