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today our presentation about tears 

the most important subject to talk about  tears 

and what they mean to us 

are tears our hearts ? which speak as lips 

So there are three different types of tears. Psychic tears (happiness, sadness) are caused by extreme emotions. Basal tears are made to keep the cornea lubricated. Reflex tears (onions, tear gas) come out in response to something else.

Are happy tears and sad tears chemically different ? 

Scientifically, tears are divided into three different types, based on their origin. Both tears of grief and joy are psychic tears, triggered by extreme emotions, whether positive or negative. ... Reflex tears are secreted in response to an irritant, like dust, onion 

  

Why do we cry tears?

Share on Pinterest Crying is a natural response to emotions or irritants like dust in the eyes. ... They are released to flush out these irritants and protect the eye. Emotional: Humans shed tears in response to a range of emotions. These tears contain a higher level of stress hormones than other types of tear

painful

tears are words too painful for a broken heart to speak

tears are words the heart can't express

its important to remember to smile at the end