Blue veins on the legs: why and whether treatment is needed. Why do we see veins bluish-blue, while blood is scarlet?

Treatment methods

Sclerotherapy An effective method used to treat varicose veins. The essence this method treatment consists of administering medicinal product V varicose veins, which damages the walls of the veins and “glues” them together

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Interesting things about phlebology

Blue veins. Treatment of blue veins

About blue veins

Knotty blue veins that bulge on the legs are not a pleasant sight, but, unfortunately, they are common. Every third person experiences varicose veins (varicose veins) during their lifetime, and women experience this five times more often than men. Women with varicose blue veins hate their legs and expose them very rarely and reluctantly. If you look at the skin, you can easily see veins. In certain places, veins of normal diameter are visible, and in some places they are dilated and dark blue in color. This is explained simply.

The skin absorbs about half of all red wavelengths and returns the rest, while it absorbs only one third of blue wavelengths. This is why veins have Blue colour. But if the blue veins are bulging, dilated and inflamed, then you should immediately consult a phlebologist, as this obvious symptoms varicose veins!

Causes of blue veins

Vienna lower limbs very vulnerable, since they bear the heaviest burden. The most common disease that signals bulging and blue veins is varicose veins. Blue dilated veins with varicose veins are a sign of a violation of natural blood circulation.

Also the cause of blue veins is bad job valves Blood begins to accumulate in the veins, in which pressure increases, forming nodes. This process takes certain years before blue veins in varicose veins become a risk factor. Externally, blue veins with varicose veins appear as highly swollen, blued (less often reddened) sections of blood vessels. Varicose blue veins greatly increase in size, losing their elasticity. If this disease is not treated, trophic ulcers may appear on the skin.

Symptoms of varicose veins

The main symptoms of varicose veins:

Blue veins;
Fatigue;
Spreading of the legs;
Trophic disorders;
Induration;

It is very important to know that in most cases, varicose veins are asymptomatic.

Women during pregnancy are especially susceptible to varicose veins and the appearance of dilated blue veins, due to increased body weight and pressure on the legs, which is caused by the development of the fetus. The tendency to varicose veins and the formation of dilated blue veins can be inherited.

Our center for modern phlebology has extensive experience in endovenous laser treatment for varicose veins. Laser devices latest generation and modern radial light guides make it possible to achieve complete success in the treatment of blue veins without pain and incisions. The treatment method should be selected only by the attending physician, based on the characteristics of the body, the presence concomitant diseases and the symptoms of the disease themselves.

In our center for modern phlebology, blue veins are varicose veins treat everyone using existing methods: surgical operations, endovasal laser coagulation and sclerotherapy. Treatment of blue veins using the method surgical intervention is by far the most effective. It is prescribed when there are advanced forms of the disease, as well as when complications occur, for example, thrombophlebitis or bleeding.

Goals surgical intervention when treating blue veins:

Eliminate the affected veins with all tributaries;
Elimination of veins with valvular insufficiency;
Elimination of the trunks of the affected veins.

After surgical operations you must wear a special compression underwear, which will help stop pathological blood flow through the veins.

The endovasal laser coagulation method is considered the most innovative in the treatment of blue veins with varicose veins. Under the influence of this technique, intravascular closure of the lumen of the affected veins occurs without their removal. Treatment should be carried out in the phlebological operating room during continuous ultrasound scanning of the veins. Laser radiation affects the vein so that it thickens and resolves. Phlebologists at our center for modern phlebology are fluent in this method of treating blue veins.

Sclerotherapy is a method treatment of blue veins with varicose veins, which is based on the gluing of the vein after exposure to the vein wall special drug. During treatment, a sclerosing agent is injected and compression garments are worn. After this, the process of obliteration or gluing of the walls of the affected veins without thrombosis begins. This method does not require anesthesia and does not leave scars.

Sclerotherapy is very effective method blue vein treatment. In one session at our modern phlebology center you can get rid of all affected areas. It is important to remember that the treatment of blue veins with varicose veins is early stages the most effective, so don’t put off visiting a phlebologist.

Blood circulates in the human body in closed system. The main function of biological fluid is to provide cells with oxygen and nutrients and conclusion carbon dioxide and products of exchange.

A little about the circulatory system

The human circulatory system has complex device, biological fluid circulates in small and big circle blood circulation

The heart, which acts as a pump, consists of four sections - two ventricles and two atria (left and right). Vessels, blood bearers from the heart are called arteries, to the heart are called veins. The arterial one is enriched with oxygen, the venous one – with carbon dioxide.

Thanks to interventricular septum, deoxygenated blood, which is located on the right side of the heart, does not mix with the arterial one, which is on the right side. Valves located between the ventricles and atria and between the ventricles and arteries prevent it from flowing in the opposite direction, that is, from the largest artery (aorta) to the ventricle, and from the ventricle to the atrium.

When the left ventricle, whose walls are thickest, contracts, it creates maximum pressure, oxygen-rich blood is pushed into the systemic circulation and distributed through the arteries throughout the body. In the capillary system, gases are exchanged: oxygen enters the tissue cells, carbon dioxide from the cells enters the bloodstream. Thus, the arterial becomes venous and flows through the veins to right atrium, then into the right ventricle. This is a large circle of blood circulation.

Further venous pulmonary arteries enters the pulmonary capillaries, where it releases carbon dioxide into the air and is enriched with oxygen, again becoming arterial. Now it flows through the pulmonary veins into the left atrium, then into the left ventricle. This closes the pulmonary circulation.

Venous blood is located in the right side of the heart

Characteristics

Venous blood differs in a number of parameters, ranging from appearance and ending with the functions performed.

Many people know what color it is. Due to its saturation with carbon dioxide, its color is dark, with a bluish tint.
It is poor in oxygen and nutrients, but it contains a lot of metabolic products.
Its viscosity is higher than that of oxygen-rich blood. This is explained by an increase in the size of red blood cells due to the entry of carbon dioxide into them.
It has a higher temperature and more low level pH.
Blood flows through the veins slowly. This is due to the presence of valves in them, which slow down its speed.
There are more veins in the human body than arteries, and venous blood overall accounts for approximately two-thirds of the total volume.
Due to the location of the veins, it flows close to the surface.

Compound

Laboratory tests make it easy to distinguish venous blood from arterial blood by composition.

In the venous oxygen tension is normally 38-42 mmHg (in the arterial - from 80 to 100).
Carbon dioxide - about 60 mm Hg. Art. (in arterial – about 35).
The pH level remains 7.35 (arterial - 7.4).

Functions

The veins carry the outflow of blood, which carries metabolic products and carbon dioxide. Nutrients enter it and are absorbed by the walls. digestive tract, and produced by glands internal secretion hormones.

Movement through the veins

During its movement, venous blood overcomes gravity and experiences hydrostatic pressure, therefore, if a vein is damaged, it calmly flows in a stream, and if an artery is damaged, it flows in full swing.

Its speed is much lower than that of the arterial one. The heart pumps out arterial blood at a pressure of 120 mmHg, and after it passes through the capillaries and becomes venous, the pressure gradually drops and reaches 10 mmHg. pillar

Why is material taken from a vein for analysis?

Venous blood contains breakdown products formed during the metabolic process. During diseases, substances enter it, which are in in good condition there shouldn't be. Their presence allows one to suspect the development of pathological processes.

How to determine the type of bleeding

Visually, this is quite easy to do: the blood from the vein is dark, thicker and flows out in a stream, while the arterial blood is more liquid, has a bright scarlet hue and flows out like a fountain.

Venous bleeding is easier to stop; in some cases, if a blood clot forms, it may stop on its own. Usually required pressure bandage, applied below the wound. If a vein in the arm is damaged, it may be enough to raise the arm up.

Concerning arterial bleeding, then it is very dangerous because it will not stop on its own, the blood loss is significant, and death can occur within an hour.

Conclusion

The circulatory system is closed, so the blood, as it moves, becomes either arterial or venous. Enriched with oxygen, when passing through the capillary system, it gives it to tissues, takes up decay products and carbon dioxide and thus becomes venous. After this, it rushes to the lungs, where it loses carbon dioxide and metabolic products and is enriched with oxygen and nutrients, again becoming arterial.

Every Sunday at the venues European University and ITMO University host scientific lectures for children, given by candidates and doctors of science, researchers and specialists.

Do plants feel anything, why is blood red and veins blue, why does a person have a runny nose - in a joint project "Children's University" And "Papers" scientists seriously answer the questions that concern every child.

Do plants have souls?

Vera Mukhina

Biologist, employee of the Institute of General Genetics

The soul is a rather complex philosophical concept with multiple definitions, so we will limit ourselves to the question of whether plants are capable of feeling, and if so, how.

Since they don't have nervous system, it is difficult to expect from plants behavior characteristic even of animals. Nevertheless, many people continue to try to prove the intelligence of plants and their ability to understand speech and emotions.

In the 60s, criminologist Cleve Baxter, inspired by the works of the early 20th century Indian scientist Jagadish Chandra Bose, conducted a series of experiments on plants. Connecting them to a lie detector, he came to the following conclusion: plants are able to remember and recognize people who have harmed them, experience emotions and read thoughts. These ideas were quickly picked up by the media and became quite popular, but were not confirmed: a careful setup of the experiment, excluding the influence of external random factors, reduced the effects described by Baxter to zero.

Plants have analogues of other senses, for example, touch.

However, this does not mean that plants cannot react to what is happening. No one questions the ability of grass or trees to respond to light or determine position in space. Plants have analogues of other senses, for example, touch. If you disturb a plant leaf with a telling name“Mimosa bashful”, it will form in a few seconds. Individual mechanisms allow plants to remember stress and even pass on the memory of it by inheritance.

Thus, plants have all the necessary arsenal of tools to interact with the world and regulate internal processes. But due to the absence of a nervous system, they are not able to think, feel pain or worry, as is typical for people.

Why is a lightning rod called a lightning rod and not a lightning rod?

Evgenia Ryabova

Philologist, teacher of Russian as a foreign language at the State University. IRYa them. A. S. Pushkina, linguist-analyst in the voice technologies department of Yandex

Ask any person about this and they will answer you: good question. Really good. After all, from the point of view of physics, a lightning rod is certainly more correct. However, in a living language, the logically sound option does not always win. The decisive role in what ultimately ends up in the dictionary is literary norm, - played by people speaking the language. It is people, native speakers, who use certain words with greater or less frequency, and it is thanks to their “correct” or “incorrect” use that the word ultimately appears in the dictionary of the modern Russian language in the form in which we now know it.

The speakers of the language play a decisive role in what ends up in the dictionary.

And they don’t just add them, they also put special marks, which are very important for a correct understanding of the functioning and status of the word in the language. So, we look at the dictionary and see: “lightning rod is the old name for a lightning rod.” Logic and justice triumph. However, why did we initially call the lightning rod incorrectly? Thunder and lightning are connected in our minds, only thunder is more terrible, more tangible, and this is recorded in language: like a thunderstruck, a thunderer. Hence the name - lightning rod. Among other things, pronouncing an extra syllable and three vowels in a row - “lightning” - is not at all convenient, and the language tends to adapt to the option that is convenient for pronunciation.

And yet, logic does not always triumph: the typewriter (in the dictionary is defined as “a polygraph. a machine for repeatedly obtaining identical prints of text, illustrations (printing copies of books, newspapers, magazines) from printed forms”) for us replaced the writing one, and under the category “ cellophane" includes all packages known to us, regardless of what they are made of.

Photo from the archive of the “University of Children”

How do we know that the Universe is infinite?

Vladimir Surdin

Astronomer and popularizer of science, senior researcher at the State Astronomical Institute named after P. K. Sternberg, associate professor at the Faculty of Physics of Moscow State University. Winner of the Belyaev Prize and the Enlightener Prize

And this is not yet known. And it will never be known 100 percent. After all, to check whether the Universe is infinite, it would need to be measured, and for this (if the Universe is truly infinite) it would take an infinitely long time. But we know for sure that the Universe is much more than that parts of it that today astronomers can see with telescopes.

The science that studies the Universe on a large scale is called cosmology, and scientists are called cosmologists. In fact, these are astronomers and physicists who are interested in how our Universe was born, how it works as a whole and what fate awaits it in the future. Astronomers observe the Universe, study the distribution and movement of stars, galaxies and matter of an as yet unknown nature, which is commonly called dark matter. And physicists are trying to explain what astronomers see in terms of existing theory, which constantly has to be developed and supplemented, as astronomers discover more and more new and unexpected properties of the Universe.

Today, only a region with a radius of no more than 14 billion light years can be seen through a telescope.

It has been reliably established that the Universe is expanding: clusters of galaxies are moving away from each other, which means that in the past they were closer and there was a moment when this expansion began. This happened about 14 billion years ago, and we call it the birth of the Universe. Today, only a region with a radius of no more than 14 billion light years can be seen through a telescope, since light from more distant regions of the Universe has not yet had time to reach us. But the size of this region is expanding at the speed of light, so in the future we will see more and more of the Universe.

It is obvious that the Universe is limitless: it is difficult to imagine any kind of wall that would limit the space of our world. But whether the Universe is infinite is an open question. Imagine an ant running along the surface of a ball: it will not encounter boundaries, but in the end it will understand that the surface of the ball is not infinite, that it has a certain area. How smaller size a ball, the greater the curvature of its surface, and the easier it is for an ant to understand that the surface of the ball is small. But if the ant discovers that the surface is practically flat in all directions, then it understands that if there is a ball under it, it will be a gigantic one, having an almost infinite surface area.

Is the Universe infinite - this is an open question

Cosmologists are in the position of an ant today. Only instead of the surface area of the ball, they examine the volume of the Universe and discover that in its geometric properties it is practically flat, which means it is very large - almost infinite. But cosmologists are as stubborn as ants. They study the Universe deeper and deeper to reveal all its secrets and find out whether it is truly infinite.

Why is blood red and veins blue?

Anna Maltseva

Surgeon at one of the Moscow clinics

Blood is an opaque, fairly thick liquid of a very intense red color, much more saturated than the color of strawberries; rather, the color of blood approaches the shade of a ripe cherry.

If plasma, a light yellow liquid, is removed from the blood, what remains is great amount small particles - red blood cells. It's microscopic small objects, which give blood its color. Most cells have a very rich red color and are similar to each other as a whole army twins. They have a very unique shape, they resemble cheesecakes - round with a dimple in the middle. Each red blood cell contains a special substance - hemoglobin, there is a lot of it in red blood cells - like filling in a pie. Each hemoglobin molecule, in turn, is also complexly structured: it has four “platforms” called “heme”. It is thanks to heme that the blood has such a deep and beautiful colour, but this is far from its only property. Various other substances can also attach to heme: they sit on “platforms”, like passengers on a high-speed train in seats, and travel together with the red blood cell.

Thanks to oxygen, the blood in the arteries becomes bright red, which is why it is called arterial

IN human body blood vessels form a very dense network, and there is no corner in the human body where at least the thinnest of vessels do not reach. It looks like a map railways: each city, town, village has its own line. The tasks of blood cells are also a little “railroad”: they transport the most different substances throughout the body in all possible directions. Red blood cells, for example, deliver oxygen and take away carbon dioxide. As blood passes through the lungs, it becomes saturated with oxygen; In every red blood cell, on every hemoglobin molecule there are four hemes where oxygen particles are placed. Oxygen-rich blood travels from the lungs to the heart and from there through the arteries throughout the body. Thanks to oxygen, the blood in the arteries becomes bright red, which is why it is called arterial. Carbon dioxide changes the color of red blood cells - from deep red to burgundy.

Blood with carbon dioxide flows towards the lungs no longer through arteries, but through veins. It was because of the color of the veins that in the 15th century there was an opinion that noble people had blue or blue blood.

In fact, everything is simpler and more interesting. The vessels themselves are made of dense white matter, impermeable to liquid, like oilcloth. The arteries have dense, opaque walls, and they themselves are located deep under the skin. The veins have a wall so thin that the color of the dark blood that flows through the vessel “shines through” it. And since the wall of the vein itself is white-gray, and the blood inside is dark cherry, when applied, the color turns out to be blue or intensely blue. This is why veins appear blue to us.

Why do people need diseases?

Anton Zakharov

Physiologist, popularizer of science, employee of the Polytechnic Museum

Modern physiology and medicine arose from reflection on this question. People have long tried to explain what happens to a person during illness. There were different versions. Hippocrates (or rather, the Hippocrates, because he was not one person, but the professional name of an entire school of doctors, which includes at least nine famous people in his time) blamed it all on the incorrect mixing of the four main body fluids. Other ancient thinkers blamed toxic fumes - miasmas - for everything, and many modern people, taking Pavlov’s ideas to the absolute, they argue that nerves are to blame for everything. Today, of course, we already know that everything is more complicated for different diseases - different reasons. There are infectious diseases, mental diseases, hereditary diseases, oncological diseases and others. And for most of them, the answer to the question of why we need them is simple. Not needed. But sometimes what is usually called a disease can still benefit us. Let's look at the example of a cold.

Colds are one of the most common infectious diseases, the cause of which is a certain group of viruses that can penetrate the cells of the mucous membrane of our nose and throat and begin to multiply there. They are called rhinoviruses. But when in ordinary life we are talking about a cold, we mean, of course, not the penetration of infectious agents into our cells, but good for everyone known symptoms diseases: runny nose, cough, sneezing, stuffy nose, fever and in some cases - weakness and headache. So, it turns out that, despite the hostility that we feel towards these symptoms, we just need them.

The temperature, which some people try to bring down as soon as it rises just above 37, is designed to help our body cope with the infection

A runny nose is the secretion of fluid from the nasal mucosa, the main part of which consists of viral particles and our own immune cells- neutrophils that came to fight these particles. By the way, due to the fact that immune cells are rushing to quickly deal with the virus, our nose is stuffy: a local increase in blood flow, and, accordingly, swelling of the blood vessels that block the access of air, is not caused by the virus, but by the immune system. The same applies, naturally, to coughing and sneezing - our body’s reflex responses to contamination of the mucous membrane with foreign agents. And the temperature, which some people try to bring down as soon as it rises just above 37, is also intended to help our body cope with the infection. A certain area of our brain, the hypothalamus, increases the temperature, and the infection suffers more from this than you and I. It turns out that everything that we usually mean when talking about a cold is our body’s immune response to the penetration of infectious agents, which ensures the fight against infection. So some diseases are still needed for some reason.

anonymous, Female, 56 years old

Hello! Let me ask you for advice. My mother (age: 56 years old) noticed that over the course of about 5 years, veins with a blue or dark purple tint began to appear on both of her legs. They are clearly visible in the photographs (see photos 1 -7). Some veins on the left leg, just below the knee, look bulging and tortuous (see photo #3). All places were not subject to injuries or bruises, with the exception of the only area in photo No. 8, indicated by a circle. As a child, she hit that spot hard. Complaints and pain this moment, veins do not cause her. However, they are cause for concern. How dangerous can this be and is it worth taking any measures now? Can conservative treatment, such as compression stockings, bring improvement? Below are links to the uploaded photographs: http://radikal.ru/fp/(photo No. 1) http://radikal.ru/fp/(photo No. 2) http://radikal.ru/fp/(photo No. 3) http://radikal.ru/fp/(photo No. 4) http://radikal.ru/fp/(photo No. 5) http://radikal.ru/fp/(photo No. 6) http:/ /radikal.ru/fp/(photo No. 7) http://radikal.ru/fp/(photo No. 8) Thank you in advance. With respect, Nicholai

Good afternoon. What you describe (veins with a blue or dark purple tint) and can be seen from the photographs are very closely spaced veins with a very small diameter (reticular veins and telangiectasias). They do not pose any threat to your mother’s health, but given the expansion of the veins in the area knee joint It is advisable to make veins of the lower extremities to exclude pathology in other veins. Having done the research, it will be possible to determine the scope of treatment, including the degree of compression of the stockings. Sincerely, vascular doctor Evgeniy Aleksandrovich Goncharov.

Consultation with a phlebologist on the topic “Veins with a dark purple tint” is given for informational purposes only. Based on the results of the consultation received, please consult a doctor, including to identify possible contraindications.

About the consultant

Details

Doctor cardiovascular surgeon(phlebologist), general surgeon, ultrasound diagnostics doctor.

Member Russian society angiologists and vascular surgeons, member of the European Society of Vascular Surgeons, member of the International Society of Lymphology (ISL)

Education:

VSMA named after. N.N. Burdenko with a degree in general medicine
Clinical residency at MMA named after. I.M. Sechenov, specialty "surgery"
Clinical residency at the National Medical Center named after. N.I. Pirogov specialty " cardiovascular surgery",
Professional retraining in the specialty "ultrasound diagnostics"

Area of professional interests: all types of operational and conservative treatment diseases of arteries and veins: obliterating atherosclerosis arteries of the lower extremities in critical ischemia and diabetes mellitus, vascular malformations and congenital angiodysplasias, stenotic atherosclerosis of the brachiocephalic arteries, aneurysms abdominal region aorta and arteries of the extremities, nonspecific aortoarteritis and thromboangiitis, Raynaud's disease and syndrome, varicose veins veins of the lower extremities, thrombosis and thrombophlebitis of the veins of the upper and lower extremities, lymphedema (elephantiasis), trophic ulcers, varicose veins of the small pelvis (pelvic venous congestion syndrome), etc., endolymphatic methods of treating diseases.

Phone number for registration: 8-915-061-87-55.

This issue was most fully studied by German scientists, who identified three main factors that determine visible blue light

1) Light absorption by blood

2) Reflection of light from the skin

3) The perception of color by our brain (dress, hello!)

Most blue veins appear on light skin (hence " blue blood"), the color of which is due to the fact that it weakly absorbs light of any wavelength.

Blood, on the contrary, perfectly absorbs light, especially in the short and medium wavelength part of the spectrum, that is, the red color is slightly worse, and therefore we see it as red.

So, the color of all wavelengths falls on the skin. Red light, having a longer wavelength, will penetrate the tissue better, plus it will be reflected by the vessels encountered. Our eye will see the picture that the light reflected from our tissues will give us.

Thus, if the vessel is located close to the surface of the skin, then almost all of the blue light is absorbed by the blood in the vessel, and part of the red is reflected -...

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There's so much you can't find on the net. Even the question about the color of blood and veins is often accompanied by assumptions and fiction, although most people actually know the answer. Yes, everything is simple here - the blood is red, only in different shades, depending on the amount of hemoglobin in it and oxygen enrichment. Everything is as taught in biology and BJD at school: arterial blood(oxygen-rich, coming from the heart) is bright scarlet, and venous (which gives oxygen to the organs, returning to the heart) is dark red (burgundy). The veins that are visible under the skin are also red when blood flows through them inside. After all, the blood vessels themselves are quite transparent. But still, many people have questions such as “Why does blood happen? different color and what does this depend on? and “Why are veins blue or cyan?”

What determines the color of blood?

The red color of blood can have different shades. Oxygen carriers, i.e. red blood cells blood cells), have a shade of red in...

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Why are veins blue?

Venous blood (in the photo it is in the right vesicle*) is dark red (purple). And the veins are blue. How can this be?

There is even an assumption that venous blood is actually blue, and it turns red only when it flows out and comes into contact with air. This, of course, is not true: when your blood is taken from a vein in the hospital, the blood does not come into contact with the air - but it is still red.

Let's follow the flight of the sun's rays

1) The sun's rays hit the skin, pass through the skin, through the subcutaneous fatty tissue, through the wall of the vein - and reaches the venous blood.

2) The rays of the Sun contain seven colors of the rainbow. Venous blood has a purple (red + blue + yellow) color, so it reflects these three colors, and absorbs all other colors.

3) Red, blue and yellow rays reflected by the blood move back: they pass through the wall of the vein, subcutaneous fatty tissue, skin - and enter our eye.

The trick here is...

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This can be explained simply by two things. Firstly, the blood contains red blood cells containing hemoglobin. It carries oxygen and in the process of capturing molecules it oxidizes and turns bright red. Hemoglobin containing oxygen is called oxyhemoglobin. It flows through arteries that branch into many capillaries, where it is given to the cells of the body. This causes the hemoglobin to turn purplish-blue, which is why the veins appear that way. If you take blood from a vein, when it comes into contact with air, it instantly turns red again.

Secondly, the skin absorbs approximately 50 percent of red wavelengths and returns the rest, while only 30% of blue wavelengths are absorbed. That's why veins look blue.

The veins of the extremities are of particular importance, since the arms and legs require a good supply of oxygen - after all, they are the most active parts of the body. There are superficial and deep veins. Deep veins are paired veins that accompany the arteries of the fingers...

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Blood in the human body circulates in a closed system. The main function of biological fluid is to provide cells with oxygen and nutrients and remove carbon dioxide and metabolic products.

A little about the circulatory system

The human circulatory system has a complex structure; biological fluid circulates in the pulmonary and systemic circulation.

The heart, which acts as a pump, consists of four sections - two ventricles and two atria (left and right). The vessels that carry blood from the heart are called arteries, and the vessels that carry blood to the heart are called veins. The arterial one is enriched with oxygen, the venous one – with carbon dioxide.

Thanks to the interventricular septum, venous blood, which is located on the right side of the heart, does not mix with arterial blood, which is on the right side. Valves located between the ventricles and atria and between the ventricles and arteries prevent it from flowing in the opposite direction, that is, from the largest artery (aorta) to the ventricle, and from the ventricle to...

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If blood is red, why are veins blue?

(Asked by E. Perrins, Eastwood, New South Wales, Australia)

As mentioned above, red blood cells, which occupy about 40% of the blood, contain hemoglobin. As red blood cells pass through the lungs, hemoglobin picks up oxygen and binds to it, causing it to turn bright red. The term "oxyhemoglobin" is used to refer to hemoglobin combined with oxygen. Oxyhemoglobin is pumped from the heart through the arteries. Red blood cells containing oxyhemoglobin then enter the capillaries, where they give oxygen to other tissues. After hemoglobin loses oxygen, it turns purplish-blue in color and is then called deoxyhemoglobin. On its way back to the heart, deoxyhemoglobin passes through veins, which appear blue through the skin. However, if blood is extracted from a vein, it will react with the oxygen contained in the air and immediately turn red.

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2014-11-18
When we say "Blue Bloods" we mean people royal origin. Documentedly, this term originated in 1834 in Spain. There is a myth that this phrase describes a condition caused by a rare genetic defect, which is inherent royal families Europe, due to their habit of marrying only into members of other European noble families. This interbreeding led to the development of a disease called "hemophilia", which in turn gave rise to the phrase "blue blood".

Queen Victoria was indeed genetically prone to hemophilia. She received the nickname "Grandmother of Europe" thanks to a large number children and grandchildren in royal houses throughout Europe. All this contributed to the spread of this gene.

A significant drawback of this theory is that hemophilia does not make the blood blue. It simply means that the body lacks certain substances in the blood that help blood clot. Depending on the type of hemophilia, the blood...

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How human heart starts beating? Is it true that the younger a person is, the faster his heart beats? Why does the heart beat constantly? Does listening to music really calm the heart? Can a person continue to live when the heart stops beating? What is cholesterol? What is the difference between “good” cholesterol and “bad” cholesterol? What is the difference between diastolic arterial pressure from systolic? Is it possible to stop your pulse? What's happened heart attack? Is there a lifetime heart rate limit? What is heartburn? What is bypass surgery? Can the heart be on the right? Does the heart have its own blood supply system? Why doesn't blood freeze on very cold days? How much blood is in my body? What is plasma? What are platelets? What is the significance of red and white blood cells? If blood is red, why are veins blue? What is anemia? Where is the spleen located and what is its function? Is it possible to live without...

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Blood is a combination of many substances - plasma and shaped elements. Each element has strictly defined functions and tasks; certain particles also have a pronounced pigment, which determines the blood color. Why is human blood red? The pigment is contained in red hemoglobin; it is part of the red blood cell. It is for this reason that there are organisms on Earth (scorpions, spiders, monkfish) whose blood color is blue or green. Their hemoglobin is dominated by copper or iron, which gives the characteristic color of the blood.

To understand all these elements that fill the blood, it is necessary to understand its composition.

Blood composition

Plasma

As already noted, one of the components of blood is plasma. It takes up about half of the blood composition. Blood plasma turns blood into a liquid state, has a light yellow color and is slightly denser in properties than water. The density of plasma is provided by substances dissolved in it: antibodies,...

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Although every person's appearance is unique, general structure people's bodies differ little from each other. For example, we all have five fingers on our hands (of course, except for rare exceptions) or feet. Or look at your veins - what color are they? Probably greenish-blue, like many others. A completely different question is why they are of this particular shade, because blood is red, which means the veins should be the same color. But it's not that simple.
The fact is that the blood flowing through the veins contains a certain amount of carbon dioxide, which, when mixed with other components, colors it dark color. Because the skin and vein walls add some distortion, they end up appearing bluish to us. According to another theory, the whole problem lies in the fatty layer between the dermis and fascia, which absorbs low-frequency light that penetrates through dark vein and reflects blue length waves.
You can even conduct an appropriate experiment. For this you need...

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The blood in them is not red - it is just so bluish because it has given up its oxygen to the body. Red blood is in the ARTERIES. Those. The body has two systems - the inflow and outflow of blood, involved in the delivery of oxygen.. For now blood is flowing from the lungs - it is scarlet. When the oxygen is released, the color changes... but in general, I should have studied biology at school. %-) (Of course, blood is not that “blue”, first of all - it’s just dark. :-))

Well, I wouldn’t want to check, but as far as I know, if you open the veins, it will flow dark red, and not blue at all. And the wreaths, here they are, are naturally blue, not purple. So you didn’t convince me personally, I don’t know about the author of the post :))))))))

Well, don’t take me for an ignoramus at all. It is clear to horses that the blood in the veins is venous and that it is not rich in oxygen. However, venous blood is not BLUE. If you look at your veins, you will see that the blood, although excellent...

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The veins that are visible under the skin are also red when blood flows through them inside. But still, many people have questions such as “Why is blood different colors and what does this depend on? And “Why are veins blue or cyan? In anatomy atlases, veins are symbolically designated in blue. If you look at a vein filled with blood, it will appear bluish.

Now the variety of children’s scooters makes Razor’s eyes widen: there are even ones that any adult would envy. This natural mechanism is a “spare” in case high temperature environment, causing crying instead of cold.

If you heat for less than 5 minutes, you can heat up to 4 times during the day. If bruising occurs at the site of the pinch, fragility of the blood vessels occurs. The land of Nod in Cyprus cannot be for any reason, simply due to geography: “And Cain went from the presence of the Lord and settled in the land of Nod, east of Eden” (Gen.

Increased blood clotting (a condition...

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Through which vessels does more dark blood and how the circulatory system works

Constant movement of blood through a closed circuit cardiovascular system, which ensures gas exchange in tissues and lungs, is called blood circulation. In addition to saturating organs with oxygen, as well as cleansing them of carbon dioxide, blood circulation is responsible for delivering all necessary substances to the cells.

Everyone knows that blood can be venous and arterial. In this article you will learn through which vessels darker blood moves, and you will find out what is included in this biological fluid.

This system includes blood vessels that penetrate all tissues of the body and the heart. The process of blood circulation begins in the tissues where metabolic processes through the capillary walls.

The blood, which has given up all its useful substances, flows first to right half heart, and then into the pulmonary circulation. There she got rich useful substances, moves to...

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