Our eyes are open most of the time, sothey need constant wetting and cleansing. To do this, our bodies have lacrimal glands, which regularly produce salty-tasting liquid and protect the eyes from drying out and getting dirty. They flow especially strongly when a person cries - it is believed that crying helps people cope with stress faster. Even if the difficult situation has not changed for the better, after crying, each person magically begins to feel better. Tears and crying are still not well understood, but why are salty tears scientists can already with complete certainty. They also have very strong evidence that crying can improve the emotional state of any person.
Types of tears
Tears and crying have been studied for a long time. The main task of tears is to wet the human eyes and protect them from germs and damage. It is important to know that not all tears are the same - depending on the situation, the lacrimal glands produce fluid with a different composition and purpose. By design, tears are conventionally divided into three types:
- basalnecessary to wet the eyeballs so that they do not dry out;
- reflexcaused by slicing onions, smoke and debris in the eyes. They are needed for protection;
- emotionalarising as a person's reaction to emotional shock and physical pain.
Tears are 99% water, and everything else isthese are inorganic substances, among which there is sodium chloride, better known to us as table salt. According to the researchers, it is this component that gives the tears a salty taste. At the same time, the salt does not sting the eyes, because its concentration is very low. The substance lysozyme is responsible for the antibacterial properties of tears, which in a few minutes can destroy up to 95% of dangerous bacteria.
Some people may also have noticed that sometimestears are also bitter. This taste arises due to the fact that during crying, the body is under stress, activates the adrenal glands and speeds up the heartbeat. All these processes increase the amount of adrenaline and other substances in the body, and then include them in the composition of tears. In general, emotional tears are sometimes divided into two types: bitter and sweet. Bitter tears are produced during stress, and sweet ones - when a person cries with happiness and laughter.
See also: Why can you cry while laughing?
That, depending on the situation, the composition of tearscan change, psychiatrist William Frey reported in 1981. As part of the study, he compared the concentration of substances in two types of tears: those that appeared in people while watching a sad movie and those that arose as a reaction to chopped onions. Do not forget that the concentration of substances in tears also depends on the state of human health. Some scientists are sure that along with tears, many harmful substances leave the body, so there is nothing wrong with that.
Why do people cry?
The reasons people cry are not completelystudied. It has long been clear to scientists that babies cry to get attention. Perhaps the same is the reason for adult tearfulness - when we feel bad, we want to be paid attention to and support. But animals cannot attract attention by crying, nor can they express their emotions and use crying as a means of communication. Scientists firmly believe that this is a purely human skill.
Crying helps you get through the worstlife situations, even wrote the ancient Greek philosopher Aristotle. And in 1986, psychologists noticed that 94% of newspaper articles about crying claimed that tears helped cope with stress. Later, in 2008, scientists conducted a survey among 4,300 people - they wanted to find out if crying really helps people improve their emotional state. Some people answered that they did not notice the changes and even begin to feel worse, but the majority still noted that tears helped them.
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What exactly is the reason for the relief that occurs insome people after crying, researchers still do not know for sure. It can be assumed that together with tears, substances that provoke the production of stress hormones are released from the human body. But the nature of adult tearfulness, no matter what theories we now build, have not been sufficiently studied.