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Health and Medicine

You Produce Three Different Types Of Tears

author

Tom Hale

Senior Journalist

clockDec 9 2015, 15:59 UTC
45 You Produce Three Different Types Of Tears
TED-Ex/YouTube

Even when you're not cutting onions or watching Titantic, your eyes are constantly producing tears.

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We actually produce three different types of tears: basal, reflex, and emotional. Basal tears and reflex tears are pretty easy to understand: they protect our eyes from debris or wash away potentially harmful substances and microorganisms. However, scientists are only just beginning to deduce why we produce emotional tears – is it to release hormones, or more of a social signal?

This video by TED-Ed gives you the science behind sobbing with an animation of Iris, the iris.

 

 


Health and Medicine
  • video,

  • eyes,

  • emotion,

  • tears,

  • crying

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