Why do people cry?
Crying – the phenomenon, natural to the person, most of which often arises in any occasion. Animals can cry too, but their slezootdeleniye is reflex.
At overflow of plaintive lakes, a salty drop rolls down a cheek. From the point of view of physiology, plaintive liquid contains the disinfecting substances interfering penetration of an infection through eyes.
Crying at the newborn appears from first minute of the birth, and the first tears – only on 4-10 week. Crying helps the baby to be protected from viruses and bacteria.
the American biochemist V. Frey conducted researches and found out that in the tears allocated during a stress of protein it is more, than in usual reflex. He assumed that by means of tears the harmful substances which are formed from a stress are removed. And also the fact that with tears the psychotropic drugs quashing tension and feeling of alarm are allocated.
Surprising is the fact that at injury of the craniocereberal nerves responsible for a slezootdeleniye when reflex function of a slezootdeleniye is broken, the ability to cry with strong experiences usually is not lost.