Why do we cry? The three types of tears - Alex Gendler

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Why do we cry? The three types of tears - Alex Gendler

TED-Ed Lesson: Whether we cry during a sad movie, while chopping onions, or completely involuntarily, our eyes are constantly producing tears. Alex Gendler tracks a particularly watery day in the life of Iris (the iris) as she cycles through basal, reflex and emotional tears.
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TED Ed

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