Welche Aufgaben hat unser Blut?

Moin people! Today there is something very special. To all sensitive people, close your eyes, because it gets bloody. At this point, a nice greeting to the blood donation service of the German Red Cross, who are with us under a blanket. The special starts right now with the basic information, namely the tasks of the blood. So, have fun! Although it just looks red, blood is actually a blatant mixture. If you centrifuge it, i.e. very quickly, the liquid splits into its components. You then see the solid blood cells separated from the liquid blood plasma. Blood consists of 42% of solid components and 58% of the plasma. Plasma consists of 90% of water and the rest are mainly proteins. The plasma proteins, for example, are there to transport hormones and to help with the immune defense. In the blood you can also find three types of blood cells. The erythrocytes, the leucocytes and the thrombocytes. They are formed in the bone marrow. Erythrocytes are the red, leucocytes the white blood cells and thrombocytes the blood cells. With the help of the huge network of blood vessels, all corners and angles of the body can be easily reached. The blood circuit is also a closed system. That's why it's called a circuit. The heart pumps up to 15,000 liters of blood per day through the vessel system. To whom the number 15,000 is now too abstract, 15,000 liters correspond to 10 to 11 full bathtubs, 1,500 buckets, 15,000 milk bags or 60,000 cups of coffee and so on. The blood is an all-rounder and mixes almost everywhere in the body. But the main function is to supply the body with oxygen. In general, you can say that there are four areas in which it is at the start. At the transport of substances, at the temperature regulation, at the defense and rinsing and at the acid-base equilibrium. Numero uno, the transport of substances. The transport of substances can be distinguished directly again. Then you have the gas transport, the nutrient transport and the washing function. The word gas transport describes the distribution of O2 in the body and the transfer of CO2 and waste products from the metabolism. So it's a breathing function. How exactly does that work? Actually quite easy. In the lungs, the blood supplies oxygen and transports it via the arteries to the cells of the body to discharge it there. At the same time, CO2 is transported via the veins to the lungs, of course also from the blood. CO2, i.e. carbon dioxide, is the waste product of breathing. From the lungs, it is then simply exhaled and thus leaves the body again. We remember, in the arteries, oxygen-rich blood flows to the cells. In the veins, carbon dioxide-containing blood flows back from the cells to the lungs. So far, so good. Let's move on to the next task, the nutrient transport. It is difficult to imagine, but the fast food waste that you eat will at some point be so tiny that its ingredients will fly through your bloodstream. The blood thus transports vital nutrients such as protein, carbohydrates, vitamins and fats. Just like the oxygen, they are then sent to the individual cells. Here, the cells are then loaded and supplied with what they need. So like a delivery service that brings everyone what they're in the mood for. Only that it's a little faster here. As the last point of the material transport, there is the washing function. To clean the body, waste and waste products are removed from the individual organs. So that they can't harm the body, they get to the so-called excretory organs, such as the kidneys. So whoever looked too deep into the glass owes it to his blood that the body doesn't get weak. The toxic alcohol is then transported to the liver and dismantled here. We notice, the blood is a delivery service and waste waste in one. In addition, the blood also has the function of regulating the temperature. The blood transports the heat through the body and creates a heat balance. Due to its large heat capacity, it contributes to the maintenance of the body temperature. So the temperature of all vital organs is constantly kept at about 37 degrees. And then there is the protection function of the blood. The defense and the retinopathy fall under it. With the white blood cells, the blood cures pathogens. They produce certain antibodies to strengthen the body against pathogens. The retinopathy is about a kind of sealing through plasma-circulating proteins and the blood cells. They are able to repair the injuries of the vessel wall very quickly and reliably and seal them. The last function has nothing to do with potato dishes, but serves to prevent an acidification of the body. It's about the buffer function of the blood, which will maintain the vital acid-base balance. Buffers are substances that prevent the blood from becoming acidic. The pH fluctuations are buffered, so to speak. The pH value of the blood is on average about 7.38 to 7.41. Again, all in short. Blood consists of 42% of solid components and 58% of plasma. In the blood, there are also three types of blood cells that are formed in the bone marrow. The erythrocytes, the leukocytes and the thrombocytes. Erythrocytes are the red, leukocytes the white blood cells. Thrombocytes are the blood cells. The main tasks of the blood are material transport, temperature regulation, protection function and buffer function. Whereby the material transport is still included in gas transport of O2 and CO2, nutrient transport and dishwashing function. Yo guys, that's it with the special special blood info video. Big thanks to the blood donation service of the German Red Cross and to the Zeitbild Verlag for the support. See you in the next video and see you there.