Laws of descent and restore the vital functions of the organism

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If be observed in the experiment, as the dog die (say, from blood loss), first of all, draws the attention of the drastic action of the animal. The body mobilizes all its resources to resist the coming death. Next period arousal replaced as if falling asleep of the body. This is because in the cortex of the brain comes spilled covering the entire crust braking, which causes a state resembling sleep.
After some increased respiration becomes convulsive, rare. The animal as it begins to swallow air - period comes atonal breathing. Then it stops. During this time there may be weak heart contractions. But after a while stops and heart. The animal doesn't react on any irritation, pupils dramatically expanded - comes clinical death.
Recovery occurs in the reverse order is first restored to the activities of those bodies, which functioned longer than the others. These are the bodies, which first emerged in the process of historical development of the animal world. It is known that the cardiovascular system in animals existed before, the first beginnings of the brain. Therefore, in the process of recovery of the organism heart, which has long remained at the time of death, comes to life first. Yet muscle tone, have not yet begun to narrow the pupils, there are no muscle and tendon reflexes, and your heart is already through 20-40 seconds after the start of recovery resumes its activities.
After some time, usually in a few minutes, started breathing that in the beginning reminds agonal breath observed at the end of dying. Breathing becomes more frequent and after a while fully normalized. Soon after the restoration of breath, a narrowing of a pupil, appear corneal reflexes, and touch the cornea of the eyes are closed eyelids. Then there muscle and tendon reflexes. Externally, the animal is still in the state of deep sleep. The highest parts of the brain including the cerebral cortex, have not yet recovered. This state can last 10-15 hours. Only after that the first signs of revival. The bark of the brain comes from the brake of the state in which it was at the time of death, clinical death and the first stage of a recovery. Thus, the brain activity which had just died, later recovered when recovery.
What is the material basis of preservation of viability of the Central nervous system during clinical death?
In the phase of agony, in the period of clinical death, and at the first stages of recovery vital functions of the body is experiencing severe anoxia. It is connected not only with the cessation of blood circulation, but with a sharp metabolic disorder caused by inhibition of certain enzymes provide the normal breathing body tissues.
The main energy material that is used tissues in the process of breathing, carbohydrates are mainly glucose. As a result of their chemical transformations of energy is released, which is used for vital functions of cells. The lack of oxygen sharply disturbs the process of tissue respiration. The breakdown of carbohydrates starts to happen without participation of oxygen. A process called glycolysis.

Registration of brain electrical activity of the dog in the norm (a) in the process of dying (B) and subsequent recovery ().

Glycolysis is the less efficient the process, energy is released approximately 16 times less than in tissue respiration. At glycolysis in the blood and tissues are formed and accumulated intermediate non-completely oxidized products of metabolism, such as lactic acid and other acids.
In many responses, defining the conversion of carbohydrates, takes part phosphoric acid. Some of the compounds of phosphoric acid are of particular importance: they focus a significant amount of energy, easily used by cells to perform their functions. An example of such a connection can serve adenosinetriphosphoric acid (ATF). At the time of death and clinical death in the brain there is a significant accumulation of lactic acid and the simultaneous decrease in the amount of carbohydrates - the main sources of energy.