Increase of efficiency of adaptations and attenuation of organism protective reactions in the process of biological evolution

Abstract

The major trend in evolution of living organisms is development of the central nervous system and sense organs, an increase of energy exchange, development of homoiothermy and of increasingly more complex forms of behavior, an increase in energy expenditure in connection with a rise of body activity and with development of adaptation to habitat. Such fundamental processes of evolution were and still have been subjected to numerous investigations and discussions. However, in different animals there exist different species-specific peculiarities of evolution of physiological functions, from which eventually the fundamental evolutionary processes are formed. We studied some of these specific processes by separating them into two categories. The first category is “Rise in efficiency of adaptations” in development of biological evolution. By this term we mean development of the amazingly perfect specific physiological mechanisms of adaptive character. The second category is “Weakening of the protective body reactions” under which we mean disturbances of the protective mechanisms of the body immune system, uncoordinated leukocyte movement in microvessels, lack of effective collateral blood circulation in brain and heart, etc.