WHY DO WE CRY :-
First of all, there are really three different types of tears. BASAL TEARS keep our eyes lubricated constantly. REFLEX TEARS are produced when our eyes get irritated, like with onions. PSYCHIC TEARS are produced when the body reacts emotionally to something. Each type of tear contains different amounts of chemical proteins and hormones. The emotional tears contain higher levels of manganese and the hormone prolactin, and this contributes in a reduction of both of these in the body; thus helping to keep depression away.
HOW DO WE CRY?
The emotional tears require an emotional response, or trigger to be activated. This response can be caused by an outside source, either pain or loss of love or from an inside source (self-realization of one's life and others). When emotions affect us, the nervous system stimulates the cranial nerve, in the brain and this sends signals to the neurotransmitters to the tear glands. Thus, we cry