Some scientists say that man is the most complex living creature, and they are right. For example, a car will not work if it is not filled with energy, in the same way the human body will refuse to function if it is deprived of energetically valuable products.

Sooner or later, the car parts wear out, as a result, you have to buy new ones, something similar happens with the human body, it is aging, some organs need additional care. Comparing a person with technology, we can say that there are certain similarities, but there are even more differences.

The human body is capable of renewal, this occurs as a result of the death of some cells and their replacement with other, new cells. In the process of death and restoration of cells, metabolism helps. This is the main life process in which numerous human organs are involved.

For example, the digestive system provides the body with chemicals that enter it in the form of food. The respiratory system is responsible for supplying the body with oxygen, which comes from the air. All body work is closely interconnected. The nutrients that the body receives from food, as well as oxygen, enter the bloodstream, which distributes them throughout the body. Blood passes through the tubes, these tubes are called blood vessels.

The heart is considered the motor of the human body, without it, in principle, human life is impossible. Blood circulates throughout the body, connecting together all parts of the body into one system.The human body has many organs, each of them plays its important role in the body. For the reliable management of all organs, the nervous system is responsible, the central part of which is the brain and spinal cord. In complex work, the regulation of all working processes of the body, the nervous system helps the endocrine glands.

If in general terms, this is the schematic structure of the human body. Although it is worth noting that each person is individual, thanks to intellectual characteristics, external data, as well as thought processes.