What is the meaning of a blood

Knowledge
& Blood

The blood is in contact with all organs and is essential for almost all body functions. The heart pumps up to 15,000 liters of blood through the veins every day.
The blood is therefore also important for the doctor, because it provides precise information about the state of health of the person and is essential for a diagnosis.

Everyone should pay attention to a healthy lifestyle in order to enable optimal blood formation and to support blood functions. If a human organism becomes sick and is no longer able to produce enough blood for its own survival, the patient is dependent on a blood transfusion. Healthy people donate blood for those whose own blood production is disturbed, because human blood is unique and can only be produced by the human body. Depending on body weight and size, a healthy adult has about 4.5 to 6 liters of blood, which corresponds to about 6% - 8% of his body weight. The blood circulates in the blood vessels (arteries and veins) and is essential for almost all functions in the body. Everyone can compensate for and cope with a certain amount of blood loss: depending on their body weight, a healthy adult can lose up to 1.5 liters of blood without causing serious damage. When donating blood, only 0.5 liters of blood are withdrawn from the body - just a tenth of the total amount of blood, i.e. a very small amount that the body can easily compensate for.

If the blood loss is more than 1.5 liters, for example due to serious accidents, injuries, operations or internal bleeding, the body can no longer supply the organs with sufficient oxygen. In these cases, sometimes only blood transfusions can save a patient's life.

Tasks:

In the lungs, the blood picks up oxygen through inhalation and transports it to the cells of the body; At the same time, the breakdown product of breathing - carbon dioxide - is transported from the blood to the lungs, where it leaves the body again by exhaling.
Driven by the heart, the blood transports important nutrients such as protein, carbohydrates, vitamins and fats to the individual cells. The transport of hormones through the blood is also particularly important. They serve as messenger substances through which important information is transmitted in the body and, for example, trigger an alert. To cleanse the body, pollutants and waste are transported from the individual organs to the various excretory organs.
The vital acid-base balance is maintained through the blood in order to prevent over-acidification of the body. The pH of the arterial blood of a healthy person is between 7.35 and 7.45.
In order to create a heat balance in the body, the blood transports the heat through the body. Due to its large heat capacity, it contributes significantly to maintaining the body temperature throughout the body and keeps all vital organs at a constant temperature of approx. 37 degrees.
The blood is responsible for the defense against pathogens. It produces antibodies to make the body immune to pathogens. Even with injuries, the blood fends off damage to the organism by clotting.