Our body - a collection of a variety of complex systems. One of the main such systems are familiar to us all defense mechanisms that help prevent diseases, allergies and other unwanted external threats. Let's briefly look at each of them. Yawning
How nice it is sometimes a good yawn in the morning at work. But why do we yawn? Mechanism of yawning today investigated very bad, but something scientists have been able to find out. One of the main reasons why people yawn, is overheating or overload the brain. If we are active, little sleep or enough sleep, we experience psychological stress or stress - the body launches special protective gear. Breathing during yawn large amount of air, we are slightly cool the brain through the upper palate, as well as disclose the airways, increasing the flow of oxygen into the blood and relaxes your muscles. In general, yawning is very useful for our body, so try to yawn as often as possible - it is both pleasant and helpful. Sneezing sneezing mechanism runs in our body when in the nasal cavity accumulates too many allergens, germs, dust, or you're just too far with black pepper in the kitchen. At this moment there is irritation of nerve endings and special person sneezes, getting rid of all the excess that was in his nasopharynx. The main thing that in front of you at that moment there was no one, and then get uncomfortable, because the speed of exhaled air by sneezing reaches 160 kilometers per hour, and in one chihe average may contain more than 100 thousand of harmful bacteria. In other words, try to hide behind a handkerchief when they sneeze, well, or at least a hand - all the bacteria you certainly will not catch, but at least reduce their spread. If a person sneezes continuously for a long time, you may find that next to it is a strong allergen to which he alludes to the body, they say, find and throw, and then the entire apartment with their mucous secretions splashed. By the way, did you know that some people are allergic to sunlight? Imagine a man woke up in the morning and come to sneeze until sunset. Well, that is not found very often. Stretching Stretching - it is also a kind of defense mechanism, though, we almost completely control it and sip on their own. However, this process is very important for the normal functioning of our body. During stretching the body prepares for physical activities that await him during the day, warm up the muscles after sleep, restored circulation, improves mood, and so on. Scientists argue that even stretching improves your taste and tactile sensations, so until you reached out to lunch even do not touch! Hiccups Hiccups - a kind of signal to the body that something is wrong with our digestive system. Of course, the common hiccups and without any good reason or as a result of a serious illness, but most often it is a sign that the body tells us: "Enough to eat!". When a person has hastily swallowing large pieces of food or overeat elementary - in this moment there is irritation of the vagus nerve, which is closely associated with our stomach and diaphragm. In all need to know when to stop and chew before you swallow it. Universal means of dealing with hiccups to this day does not exist. Helps one breath-holding, the other - a glass of water, and the third - nothing helps. They just lie and humbly forward to when this is all over. Myoclonic jerks you know the feeling when you are lying in bed, begin to fall into a nice enveloping you sleep, and at this very moment your entire body if the current beat. All the muscles in a jiffy reduced so much that you already throws on the bed, on which you immediately wake up and look around helplessly in the dark. This phenomenon is also part of the protective complex with you our body and it is called "myoclonic jerks." The fact is that when you start to fall asleep, your breathing rate decreases sharply, and the pulse slows down slightly, the muscles are relaxed, and in the aggregate like state your brain misinterprets as dying. That's why it sends a strong impetus to save his master. We can say that the brain is trying to revive you with the built-in stun your body. Of course, after it turns out that you did not even die, the brain calms down a bit and allows you to sleep normally. But you must admit, it's nice to know that he constantly monitors our security. Swelling of the skin from moisture I think that all faced with swollen water fingertips and toes, after prolezhit in the bathroom longer than usual. Funny picture obtained on the skin of children is especially amusing. It would seem that this may be useful in this phenomenon for our body? As scientists discovered, swelling of the skin does not happen by accident. Our body feels that faced with high humidity, and where humidity - there may be slippery. Therefore, the skin on our fingertips immediately begins to transform in order to increase its grip on smooth surfaces. In other words, the body does everything that we have not slipped on the wet floor and were able to catch their new "superpaltsami" for something before you fall and hurt to hit something hard. Who said we were not a little superheroes after that? Memory Loss Memory loss in some cases - is not the result of the meeting of the head with a heavy blunt object, but a very smart way to protect our fragile psyche of not the most pleasant memories. There are numerous cases in which the victims of violence, different or natural disasters completely forgot about the most terrible moments. And, on the one hand, in our body it can understand. Why record to permanent memory that does not bring any happiness to man and pleasant sensations? Better to permanently remove it from the internal drive and save the owner from unnecessary emotions. By the way, do you know why after taking a certain dose of alcohol, we stop to remember anything? When a person strongly overdoing alcohol and leads most of their motor functions in complete disability, the body begins to seem that the body is exposed to a huge overload and multiple threats from the outside, which means it is unlikely that a person is experiencing its "best of times." Therefore, recording memories simply turned off to play it safe and do not let you in the morning to remember almost nothing. So then agonized reflections: "Well, I've done this yesterday, today woke up in the loft of pigeons, so even with an accordion in his hands?". Goosebumps Funny bumps that appear on our skin in the moments when we are cold, or when we are very emotionally excited, too, are part of the defense industry of our body. First and foremost, their function - reduction of heat through the pores in our skin, whereby the body is much easier to keep warm in adverse climatic conditions. A second emotional reaction of "goose bumps" has not been investigated to the end, but scientists suspect that all this came to us from the distant past of our prehistoric ancestors. While they were not so bald, as we are now. Their bodies were covered with thick hair, and it would be foolish not to use to their advantage.When tiny muscles near the hair bulb of a tense emotional outburst (and while most often in nature met fear), they lift each hair in a vertical position. All this, in turn, leads to the fact that the hair on the body of our ancestors instantly fluffs, whereby they became a little more visually and looked far more intimidating to their enemies (this mechanism is now actively using domestic cats and many other mammals). Walked Goals, evolution did not spare anyone. We bald and protective mechanism remained to this day. And when we are experiencing a particularly emotional moment - our body tries to fluff fur, which we almost gone. Because of this, we become like a strange overexcited goose rather than majestic fluffy Pallas cat. It is a pity it would be useful at times become a little bigger and fluffier to impress someone. Tears In addition to the protective function of the mucous membrane in contact with foreign bodies in the eye tears are also a tool of emotional defenses. Scientists believe that in stressful situations, the body creates a new, very powerful focus of irritation, which is designed to distract people from the pain that he experienced before. When a child is hit or cut himself, his cerebral cortex enhances a variety of bodily functions: breathing, movement, function of endocrine and exocrine. But the main outward sign that a person is experiencing physical or emotional pain, of course, are the tears. Increased tearing reduces excitation of the cerebral cortex caused by injury or cuts. And it happens because when crying tears still fall into the nasal cavity, where abundantly irrigate mucosa, and the shell, this, in turn, is saturated and the olfactory receptors of the trigeminal nerve, which transmit signals directly to the brain, diverting it from the main source irritation, i.e. pain. So when a person cries, he's really kind of dulls the pain. Incidentally, in the mid-80s in the USSR special study was conducted in which researchers found that the wounds on animals heal much faster if those cause tearing. But those animals, lacrimal glands were removed, wounds healed much longer than usual. How can you not cry when it is so useful? Additional feelings Although most often we hear about the five senses, which is endowed with people these feelings we have much more. List them all I can hardly undertake, as a topic for a much more expanded material, nevertheless couple of examples, I will give you all the same.Imagine that in one hand you hold a red-hot iron, and the second hand hold it close to the heated surface. You feel the warmth and know that if you touch the iron now - you will experience pain, although none of your five senses, you can not tell it. You do not see the heat, do not hear it, do not feel it to taste, do not touch him physically, it does not feel the smell. Yet you feel warm and a potential threat to its security. It provided a sense of warmth sensors located in your skin. And what a feeling helps us to feel pain or realize that we hung upside down? Another very simple example: try to close your eyes and touch your finger to the tip of the nose.Now you have not used any of their five basic senses. This feeling is called "proprioception" - it allows us to know exactly where our limbs and all parts of the body, through the knowledge of the size and shape of your body, as well as an informational support of the brain that monitors the status and position of each of our muscles in space. All these, and many other additional senses are but the main defense mechanism of the human body, which is almost every time does not allow us to be in trouble.