Why do we shed tears when we cry and when we are sad and you know just general depression??

[Anaconda]

i know it sounds like one of those questions a little curious kid would ask, but hey! i just wanna know! whats the science behind it?

 

[GoldenBear]

Why do we release another form of liquid when we're *happy*?

 

[RaoulDuke]

cause it's the gift of life.

tears = saltwater.

 

[Elledan]

Hard-wired responses. Blame evolution.

Why tears? Normally, after tears are produced by the glands above your eyes, they're transported via a small duct from the eye to the nasal cavity. Since when you cry, the secretion of tears by those glands increases and the capacity of those ducts is limited, the excess tears obey the law of gravity and leave the eye via the only other possible way. Over your face.

Depression is a certain mindset. We don't know how it works, although lowered amounts of certain hormones are likely to blame for many cases of depression.

 

[Anaconda]

do we REALLY know or is it just theories and such

 

[Elledan]

<< do we REALLY know or is it just theories and such >>

Do we know the exact workings of the Human mind? No.
Do we know what processes in the mind causes us to cry or feel depressed? No.
Can we make theories based on observations? Yes.

 

[yellowperil]

Maybe he's asking for the function of crying, you know, evolutionarily speaking.

?

 

[Elledan]

<< Maybe he's asking for the function of crying, you know, evolutionarily speaking. >>

I can't read minds, but it's possible.

Crying doesn't serve any function except as a signal to other people. Depression is merely a sign of a malfunctioning brain and/or body.