Does blood belong to the fabric of what and why?

Many people do not even suspect that blood belongs to connective tissue. Most believe that this fluid is a mixture of many elements and nothing more. However, this is not the case. Blood is a connective tissue that has a red color and is constantly in motion. This liquid performs important and rather complex functions in our body. Circulates blood through the circulatory system constantly. Due to this, it transfers all gaseous components and dissolved substances necessary for metabolic processes. But why is the blood referred to the tissues? It's liquid.

Composition of blood

To understand what kind of tissue blood is and why, you should consider not only its basic functions, but also the structure. What is it? Blood is a tissue consisting of cells and plasma. In this case, each of the elements performs certain functions and has its own properties.

Plasma is an almost transparent liquid that has a slightly yellowish tinge. This component accounts for most of the total blood volume in the human body. The plasma contains three main types of uniform elements:

1. Platelets are blood plates that have an oval or spherical shape.
2. Leukocytes are white cells.
3. Erythrocytes are red cells that give blood a distinctive color due to the high content of hemoglobin.

Not everyone knows how much this liquid is in our body. About 4-5 liters of blood circulates through the circulatory system of a person. At the same time, 55% of the total volume is occupied by plasma, and the remaining percent falls on the formed elements, of which the major part is the erythrocytes - 90%.

Color of blood

So, what kind of tissue is blood, more or less clear. But not everyone knows that this liquid can have different shades. For example, the blood that flows through the arteries first enters the heart from the lungs, and then carries oxygen throughout the body. It has a bright scarlet color. After the element O ₂ is distributed on the tissues, the blood flows back to the heart through the veins. Here, this liquid becomes darker.

Blood properties

What type of tissue does blood belong to and what properties does it have? First of all, it should be said that this is not just a liquid. It is a substance whose viscosity depends on the percentage of red blood cells and proteins in it. Similar properties affect the speed of movement, as well as the blood pressure. It is the movement of the components of the composition and the density of the substance that determines the fluidity of the tissue. Individual cells of blood move completely differently. They are able to move not only individually, but also in small groups, for example, with respect to erythrocytes. These uniform elements are able to move in the center of the vessels in the form of "piles", which outwardly resemble folded coins. Of course, red blood cells can move one by one. As for white cells, they usually stay along the walls of the vessels and only one at a time.

What is plasma?

To understand what kind of tissue blood is, you should consider its components more carefully. What is plasma? This component of blood is a liquid of light yellow color. It is almost transparent. Its shade is due to the presence in its composition of colored particles and bile pigment. Plasma is about 90% water. The remaining volume is occupied by dissolved in the liquid minerals and organic substances. It is worth noting that its composition is not constant. The percentage of the same components may vary. These indicators depend on what kind of food the person used, how many salts there were and how much water. The composition of substances in the plasma is as follows:

1. 1% - minerals, including potassium, magnesium, iron, calcium, sodium cations, iodine, sulfur, phosphorus, chlorine anions.
2. Organic substances, including about 2% urinary, lactic and other acids, amino acids and fats, 7% proteins and about 0.1% glucose.

Composition of plasma

The proteins that make up the plasma take an active part in the water exchange, as well as in its distribution between the blood and the tissue fluid. Of course, these are not all functions of these components. Thanks to proteins, the blood becomes more viscous. In addition, some components are antibodies that neutralize foreign agents in the body. A special role is assigned to fibrinogen - a soluble protein. This substance is involved in the processes of blood clotting. Under the influence of certain light factors, it turns into fibrin, which does not dissolve.

Blood refers to the type of tissues that perform special functions in the human body. Its composition is unique. Plasma also contains hormones produced by the glands of internal secretion. The composition of this blood component also includes substances that are necessary for the normal functioning of our body. As a rule, these are bioactive elements.

It should be noted that plasma, in which there is no fibrinogen, is usually called serum.

Erythrocytes

In order to understand what kind of tissue blood is and why, you should consider more carefully not only its composition, but also what functions perform certain components. And there are not so many of them. Most of all in the blood contains erythrocytes. These components account for 44 to 48% of the total volume. Erythrocytes are cells in the form of discs biconcave in the center. Their diameter is about 7.5 μm. This form of erythrocytes increases the efficiency of all physiological processes. Due to the concavity of the cells have a larger area. This factor is very important for better gas exchange. It is worth noting that mature erythrocytes do not have nuclei. The main function of these blood cells is the transfer from the lungs to other tissues of such an important substance as oxygen. This fact allows us to assert that blood refers to a tissue that performs transport functions.

Basic properties of red blood cells

The name of red blood cells in Greek means "red". By their hue the cells are required by the protein to hemoglobin. This substance has a very complex structure and is capable of binding to oxygen. As part of hemoglobin, several main parts have been identified: protein - globulin, and non-proteinaceous, which contains iron. The latter substance allows you to attach oxygen to the cells.

Erythrocytes are formed, usually in the bone marrow. Full maturation occurs five days later. The lifespan of erythrocytes is not more than 120 days. These cells are destroyed in the liver and spleen. In this case, hemoglobin breaks down into globulin and non-protein components. The release of iron ions is also observed. They return to the bone marrow and are used in the re-creation of blood cells. After the release of iron, the non-protein component of hemoglobin is converted to bilirubin, a bile pigment that comes with bile in the digestive tract. Reduction in human blood levels of erythrocytes, as a rule, leads to the development of anemia, or anemia.

Leukocytes

Blood refers to the tissues of the internal environment. In addition to plasma and erythrocytes, it also contains leukocytes. These cells are absolutely colorless. They protect the body from the effects of harmful agents. In this case, white corpuscles are divided into non-grained - agranulocytes, and granular - granulocytes. The latter include eosinophils, basophils, neutrophils. They differ in their reactions to certain dyes. To granular are lymphocytes and monocytes. They have granules in the cytoplasm, and also a nucleus, which consists of segments.

Granulocytes protect the body from microorganisms. These components are able to accumulate in the foci of infection and leave the vessels. The main function of monocytes is the absorption of harmful agents, and lymphocytes - the production of interferon and antibodies, as well as the destruction of cancer cells.

Platelets

The blood also includes platelets. These are small colorless and denuclearized plates, which, in fact, are fragments of cells located in the bone marrow - megakaryocytes. In form, platelets can be rod-like, spherical and oval. Their lifespan is no more than 10 days. The main function of platelets is to participate in the processes associated with blood clotting. These blood cells are capable of releasing substances that participate in certain reactions triggered by damage to the walls of blood vessels. In this case, fibrinogen gradually turns into a filament of insoluble fibrin. Blood cells are entangled in them, and as a result, a thrombus is formed.

The main functions of blood

Blood, lymph belong to a tissue that not only carries oxygen and other beneficial components to the organs, but also performs several more main functions. The fact that these fluids are important for humans, no one doubts. But not everyone knows why blood is needed.

This fabric performs several important functions:

1. Blood refers to a tissue that protects the human body from various injuries and infections. In this case, the main role is played by white blood cells: monocytes and neutrophils. They rush to the affected areas and accumulate in this place. Their main function - phagocytosis, in other words - the absorption of microorganisms. In this case, monocytes refer to macrophages, and neutrophils to microphages. As for other varieties of leukocytes, for example lymphocytes, they produce antibodies that fight harmful agents. In addition, these blood cells are involved in the removal of dead and damaged tissues from the body.
2. Also, do not forget that blood refers to a tissue that performs transport functions. These properties are very important for the body. After all, the blood supply affects virtually all processes, for example, breathing and digestion. Cells of liquid tissue carry oxygen through the body and produce carbon dioxide, end products and organic substances, transport bioactive elements and hormones.

Special function of blood

Blood refers to a tissue that regulates temperature. This fluid is necessary for the person for the normal functioning of all organs. It is the blood that keeps the temperature at a constant. At the same time in the norm this indicator fluctuates in a rather narrow range - about 37 ° С.