The brain consumes the most energy in the body up to 20 percent of total consumption. Recent research shows that two-thirds of this energy is used to transmit and process signals and one-third to clean up the space in which nerve cells work. The effectiveness of cleaning activities is related to blood and its properties and its ability to remove waste products from the cleaning area. There are about 100 trillion neurons in the brain.
The article is very technical and describes the process of body functioning through chemistry and physics. The body works on the basis of chemical and physical processes, which explain how we digest food, how metabolism works, how waste accumulates etc.
Cardiovascular diseases are referred to as diseases of civilization, which means that they are lifestyle diseases. When we are young, we have perfect blood, because the organism grows and takes everything it needs from food. When we grow up and for many years we are under the influence of negative factors, the processes of waste storage in the body begin. If a person does not get rid of them enough, the wastes accumulate in the body - they settle and cause diseases.