two lacrimal gland located at the top outer corner of each eye (under age) very near to each other.They are, in fact, produced water content of tears (which is about 98%).Special tubules tears follow in the thickness of the conjunctiva, where 'enriched' mucus and fat, too significant a part of the bitter drops.Standing out from the lacrimal papilla, "salt water" with each blink evenly distributed over the surface of the eye.Surplus her tears and fulfill their functions (namely - cleansing), drain into the tear ducts in the inner corner of the eye, which, incidentally, are associated with the nasal cavity.That's why when we cry, too, flowing from his nose.Usually one eye tear glands produce between 0.5 and 1 ml of fluid per day.However, violations of the mental state of the person and the disease swept some help to change these parameters.So pea tears consists of three layers: the mucin (mucus), liquid and lipid (fat).Lower mucous layer - a "foundation" for the entire film (mucins - an
to eye was keen, it should be wetted regularly.In addition to the "irrigation" drop of joy or despair ensure adequate nutrition of the cornea and its oxygen saturation, a reflection of microbial "attacks" washout "waste" and the waste products of various specks.All this is possible only if the liquid is evenly distributed over the surface of the eye due to the movement of the eyelids, resembling the movement of automobile wiper.During crying alternates short breath and energetic long breath (training circulatory and respiratory systems), then breathing stabilized - and pleasant relaxation (after the exercise) is guaranteed.In addition, the secret tears contain psychotropic substances that reduce the feeling of stress and anxiety (through tears body parts with excess hormones secreted in stressful situations "salvo").According to American scientists, the composition of tears depends on the occasion of spilling.The most dense, rich, salty - grief and despair.They found a lot of protein and specific chemical elements produced during stress.Stash is a "good" is very harmful.Depressed negative can lead to nervous system disorders, cardiovascular disease, ulcers and even cancer.Not by chance the men "who do not cry", live on average seven years less.So cry to your health!According to statistics, tears without a special occasion pour 74% of women and 20% of men who cry out in pain - 36% and 25%, from the love and related experiences - 41% and 22%.Sobbing over a work of art peculiar to 71% of women and 40% of the macho.The biggest crybabies in the world, according to the Dutch professors, Chilean (in second place - an American - the third Turkish woman).Ukrainians in the ranking for some reason, no ... Although a weeping Yaroslavna our already legendary.Tears caused by physical pain - analgesics.They contain bioactive substances that act like morphine.It is also a powerful anti-bacterial and anti-shield - an enzyme found in tears, lysozyme destroys 5-10 minutes 95% of the bacteria.Therefore, the ancient custom to wash the wounds of soldiers with tears were still rational.
Why do not they cry?
On average, for the life of a person sheds 70 liters of tears.It is believed that the weaker sex tearful because of the blood of the hormone prolactin, also responsible for the ability to let a tear, and for milk production during breastfeeding.In men, the level is low, but the amount of testosterone, which prevents the accumulation of tear - high.