Physiological death is the irreversible cessation of vital functions of the animal or human body. Physiological death is a state when the functioning of vital organs and systems in the body ceases. Depending on which systems stop working, there are several types of physiological death: * cerebral (brain) death; * cardiopulmonary; * general. That is, cardiopulmonary death occurs due to a sharp decrease in blood pressure and is one of the stages of general death, completing the life cycle of any organism. Thus, physiological death is a sign of dying. The processes of decay of biological tissues begin primarily immediately after blood circulation stops. When the body temperature of the deceased is reduced, this phase lasts up to two days. Usually they are inhibited at the stage of chemical decomposition of tissues preceding the onset of mummification. But if a person died under the influence of high temperature, then these processes cannot be expected: the so-called phase of biomass combustion begins. This is relevant for disasters, accidents, fires, and similar events accompanied by an explosion. Recently, the question of how physiological death occurs has been increasingly raised. It differs from the clinical one only in that it occurs at a slower pace, but in most cases this is the end for a person. Most often, the process causes sudden cardiac arrest. Various external factors can resist this process. These include the onset of hypoxia, respiratory arrest during hypovolemic shock, as well as a drop in blood to 60 mm Hg. Art. and less. This can happen when the chest is damaged or deformed,