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Author Topic: why can humans cry for so long?  (Read 4040 times)

Offline kdlynn

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why can humans cry for so long?
« on: 09/08/2007 06:19:00 »
i was just thinking about how humans can cry for hours at a time if we're really sad. how do we not run out of tears?


 

Offline Karen W.

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why can humans cry for so long?
« Reply #1 on: 09/08/2007 17:56:19 »
Very good question .. I am curious also!
 

another_someone

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why can humans cry for so long?
« Reply #2 on: 09/08/2007 19:27:26 »
Tears don't consume that much fluid.  I would guess that even continuous crying would be producing less secretions that the saliva glands do over a similar period of time.
 

Offline Karen W.

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why can humans cry for so long?
« Reply #3 on: 09/08/2007 19:45:36 »
Thats interesting..Tears seem so fluid ...but I didn't think about using the saliva glands as a comparison over time.
 

paul.fr

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why can humans cry for so long?
« Reply #4 on: 09/08/2007 19:51:03 »
Wild scepulaton number 1. Girls cry more than boys
Wild scepulaton number 2. When you are emotional, this may cause the tear duct to become blocked, resulting in more than normal tear production.
 

paul.fr

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why can humans cry for so long?
« Reply #5 on: 11/08/2007 15:32:04 »
Also, when crying you tend to keep rubbing your eyes. This could irritate them, causing more tears.
 

Offline DoctorBeaver

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why can humans cry for so long?
« Reply #6 on: 11/08/2007 21:04:12 »
I'll check Calvin's tear production next time he can't have sweets
 

The Naked Scientists Forum

why can humans cry for so long?
« Reply #6 on: 11/08/2007 21:04:12 »

 

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