What is the body's purpose of crying? Where do tears come from?

Answer 1

Tears are a liquid produced by the body's process of lacrimation to clean and lubricate the eyes. The word lacrimation may also be used in a medical or literary sense to refer to crying.

Physiology
In humans, the tear film coating the eye has three distinct layers:

The mucous layer contains mucin secreted by the conjunctival goblet cells. The inner-most layer of the tear film, it coats the cornea to provide a hydrophobic layer that allows for even distribution of the aqueous layer.
The aqueous layer contains water and other substances such as proteins (e.g. tear lipocalin, lactoferrin and lysozyme[1]) secreted by the glands of Kraus and Wolfring and the lacrimal gland.
The lipid layer contains oils secreted by the Meibomian glands. The outer-most layer of the tear film, it coats the aqueous layer to provide a hydrophobic barrier that retards evaporation.
One lacrimal gland is located above and beside each eye, behind the upper eyelid. The lacrimal glands secrete lacrimal fluid which flows through lacrimal ducts into the space between the eyeball and lids. When the eyes blink the lacrimal fluid is spread across the surface of the eye. Lacrimal fluid gathers in the lacrimal lake, then flows via the puncta through the lacrimal canaliculi at the inner corner of the eyelids through the nasolacrimal duct, and finally into the nasal cavity. An excess of tears, as with strong emotion, can thus cause the nose to run.

Answer 2

There are glands in the eyelids that produce a salty solution that serves to keep the surface of the eye moist. If the eyes are irritated in any way, like by dust or the fumes from an onion, more solution is produced to protect the eyes.
When we are upset a hormonal response triggers the tear glands go into overdrive.

Answer 3

Do you know that it is better to cry than to have fun? It may be contradictory to common belief but this could be reflected in Ecclesiastes 7:2. It says—

“It is better to go to the house of mourning than to go to the house of feasting: for that is the end of all men; and the living will lay it to his heart.”

Do you know that crying can be a good medicine for stress? This was found out in a study conducted by experts in America. Based on the research, crying lightens one’s feelings, and people with positive attitude towards crying have a very slim chance of developing ulcer, colitis, and other stress related diseases.

Dr. William H. Frey II, a biochemist, found out that tears have a complex chemical composition more that others think. Researchers found out that there is a big difference between tears caused by joy, anger, and sadness and tears caused by irritation. Based on research, emotional tears contain more substances that our body develops whenever we are under stress. And this is hazardous to one’s health. Because of this, it is believed that crying is an effective way of eliminating wastes in our body because tears remove these stress-related substances. This is the reason why a person feels better after crying. Also, according to reports, tears caused by emotional outbursts have higher protein concentration, which cures emotional stress.

Crying that is triggered by emotional pain is not something that one should be ashamed of, inasmuch as this is but one natural physical process, which is very helpful in easing one’s pain. One psychotherapist said that, “Crying is good for the soul. It opens the lungs, washes the countenance, exercises the eyes, and softens down the temper.” That is why we can say that the Bile is a book that never goes out of fashion. What the Bible said thousands of years ago, are being confirmed by Science today. And one of these truths pertains to crying.

One more thing, for God, a broken and contrite heart is better than a rejoicing heart. This could be read in Psalms 51:17—

“The sacrifices of God are a broken spirit: a broken and a contrite heart, O God, thou wilt not despise.”

This is a key to success and prosperity. In every field of endeavor, success and victory become attainable if our efforts are coupled with tears. Let the tears fall as we struggle for victory.


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Answer 4

crying can release stress

some random scientists have investigated the chemical composition of two different kinds of tears: the tears shed by a person when he/she feels stressed/worry/sad etc. and the tears shed by a person to lubricate his/her eyes/during yawning (not to do with emotion

results show that tears that are shed for negative emotional reason contain some toxic chemicals

Answer 5

The tears come from lachrymal glands (spelling?) within the eye socket.

The purpose of tears is to cause the man to give in to his lady.