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2007-01-28 02:50:23 · 4 answers · asked by emi 3 in Science & Mathematics Other - Science

4 answers

From tear glands that are between the bridge of the nose and your eye, then roll down through the tear ducts.

Much like saliva glands in the mouth.

2007-01-28 03:01:23 · answer #1 · answered by shovelkicker 5 · 0 0

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.

Types of tears

There are three very basic types of tears:

1. Basal tears: In healthy mammalian eyes, the cornea is continually kept wet and nourished by basal tears. They lubricate the eye and help to keep it clear of dust. Tear fluid contains water, mucin, lipids, lysozyme, lactoferrin, lipocalin, lacritin, immunoglobulins, glucose, urea, sodium, and potassium. Some of the substances in lacrimal fluid fight against bacterial infection as a part of the immune system.

2. Reflex tears: The second type of tears results from irritation to the eye by foreign particles, or substances such as onion vapors, tear gas or pepper spray. These reflex tears attempt to wash out irritants that may have come into contact with the eye.

3. Crying or weeping (physic tears): The third category, generally referred to as crying or weeping, is increased lacrimation due to strong emotional stress, depression or physical pain. This practice is not restricted to negative emotions; many people have been known to cry when extremely happy or when they are laughing. In humans, emotional tears can be accompanied by reddening of the face and sobbing — cough-like, convulsive breathing, sometimes involving spasms of the whole upper body. Tears brought about by emotions have a different chemical make up than those for lubrication.

2007-01-28 11:01:05 · answer #2 · answered by toxisoft 4 · 0 0

Tears are produced in the lacrimal glands of the eyes and are carried into the eyes and nose through the lacrimal ducts. These are loosely called tear glands and tear ducts.

2007-01-28 11:07:19 · answer #3 · answered by greenhorn 7 · 0 0

our eyes!!!! Duhhhhhh!!

2007-01-28 17:33:00 · answer #4 · answered by blah blah blah! 2 · 0 1

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