Disease from the point of view of evolution

In the process of evolution, such compensatory reactions as enhanced absorption of sodium chloride and an increase of arterial pressure could be formed only for compensation of acute pathological states (blood loss, dehydration). At present they remain similarly adequate in acute disturbances of blood circulation and of water-electrolyte balance. However, in severe chronic pathology of heart and kidney they often lose their compensatory function and even become dangerous. Evolution of man and of human society has created novel social conditions of adaptation. They are of humanitarian and technogenic character by promoting prevention and treatment of diseases.