How does tears comes out from the eyes?

@uolyram (266)
Philippines
August 28, 2012 9:06pm CST
I am wondering why do people cry, when we are sad and felt something very painful we can cry. But why does tears comes out from our eyes, how does this tears being formed and comes out in liquid. Can you share how this thing happened?
2 responses
Gretchen522
@Gretchen522 (715)
• China
29 Aug 12
Tears come from tear gland;it is a basicity transparent liquid,which formed by 98% water,2% protein,enzyme,lipid,inorganic salt and so on. People will have tears not only when he feels sad but also when he feels happy and moved. Different people at different age have different tears. The difference is the tear's weight. A baby's tear may tell us he is hungry,and an old man's tear may tell us he has thoroughtly understood the life.
uolyram
@uolyram (266)
• Philippines
29 Aug 12
Thank your for your share, such a great response what you have share.
Shavkat
@Shavkat (140024)
• Philippines
31 Aug 12
The mere fact, we tend to cry because of our tear glands. Try to research the key word mentioned earlier. I hope it will enlighten you.