What are the tears? Bashny.Net

It turns out that tears are different, too. So there is a classification of tears in chemical composition, which distinguishes basal, reflex and emotional tears.

The first type of tears is basal, which are allocated continuously without our permission or desire. They need to smahivat the cornea of the eye and protect it from bacteria, dust and various germs.

By the way, the first days of life infants cry such tears.





Reflex is a physiological tears, which "vspuchivaet eyes" to get rid of various stimuli, moistened eyes. So our eye reacts to tear eyes or, for example, evaporation from the bow.

Also, it often happens that we direct cry when our eyes accidentally knocked up some little bug or getting an eyelash. These tears our eye wants to get rid of foreign particles.





And the third type of tears is emotional, that occur or because of great sadness, whether because of great joy.

Sometimes, though, that we "swooped" incomprehensible sadness, and we cry because everything is so bad. The fact that emotional tears contain the hormone prolactin, which provides good psychological well-being.

By the way, the only living creature that can cry emotional tears.

Previously, scientists thought that these tears you cry, when you need vvesti from the body some chemical elements. Now decided that such tears indicate emotional pain.









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