Curiosities about tears

December 17, 2009 | In: Medical facts

Tears seem less interesting, but in reality are an important part of human body. Tears contain not only water but a mixture of proteins, antibodies and other substances with antiviral and antibacterial properties:a glass of tears would be more nutritious than a glass of water.

The composition of tears is made up of three layers: an external one, oily, whose function is to prevent rapid evaporation;a middle layer, watery and salty, which takes oxygen and nutrients to the surface of the eye and one composed of mucus, witch spread tears on the eye surface.

In a lifetime, each eye produces about 70 gallons of tears, excluding tears caused by emotions and irritation.