Where are the harmful substances carried away by the blood? Protective function of body fluid

Blood together with the vessels is the transport system of the body. Every second it carries various compounds, some of which are toxic. Where are harmful substances carried away by the blood, and what processes occur with them in the body?

Protective function of blood

Various compounds and microorganisms entering the internal environment through the respiratory and digestive systems, as a result, are in the bloodstream. Many of them are capable of causing serious harm and causing dangerous diseases.

Where are the harmful substances carried away by the blood ? They are faced with the action of leukocytes. These protective cells absorb and then digest all foreign proteins, viruses and microorganisms. This process is called phagocytosis, or intracellular digestion. In this case, the leukocytes themselves die, and new ones are formed in the lymph nodes and thymus gland.

Where are the harmful substances carried away by the blood?

Together with food and air inside the body are different toxins. Where are the harmful substances carried away by the blood? First of all, they pass through the so-called barrier organs. Consider the mechanism of their action on the example of the liver.

This is the largest digestive gland, which receives blood from the veins of the stomach and intestines. Here, useful compounds are filtered from it, and toxins are neutralized. Together with the bile they go out. In the liver, phagocytic destruction of destroyed erythrocytes also occurs. Removal from the body of harmful and unnecessary substances occurs through the organs of digestion, respiration, urination and skin. The main products of exchange include carbon dioxide, urea, heavy metal salts.

Nutritional function of blood

Now let's figure out where the destroyed nutrients are carried away by blood. Proteins, lipids and carbohydrates are biopolymers. This means that they all consist of a certain number of repeating parts. In the digestive tract, proteins break down into amino acids, polysaccharides to simple carbohydrates, and fats to glycerin and higher carboxylic acids.

At the same time, a certain amount of energy is released, which is used by organisms to carry out life processes. Why is biopolymers destroyed? The thing is that their molecules are very large. Therefore, they can not penetrate from the digestive tract into the bloodstream. Monomers do this without difficulty. With the blood flow they come to cells and organs, where they are again "assembled" with the formation of complex organic substances.

Execution of gas exchange

Gas exchange is also a necessary condition for the normal functioning of the body. Oxygen along the respiratory tract enters the lungs, which contain a huge number of small vesicles - the alveoli. The role of these microscopic structures is enormous. It is in the alveoli that there is a gas exchange between the respiratory and circulatory systems.

Their activities are always carried out together. Oxygen oxidizes organic substances, resulting in the formation of carbon dioxide. This substance forms a non-stable compound with hemoglobin. Where are carbonated carbon dioxide and water vapor carried away? Of course, again in the lungs, after which with exhalation they are removed from the body.

So, in the article, we sorted out where the harmful substances are carried away by blood. Entering the body, they pass several so-called protection lines. They are blood and lymph, the gastrointestinal tract, liver, kidneys, skin and lungs. Some of the harmful substances are neutralized in them, and the rest come out with the help of excretory organs. Thanks to this process, the consistency of the internal environment is maintained and the protective function of the blood is carried out.