title: Living systems. I. The nature of living systems.
mesh_terms: D000220:Adaptation, Biological; D001519:Behavior; D001695:Biology; D003491:Cybernetics; D005246:Feedback; D005793:Generalization, Psychological; D006801:Humans; D007257:Information Theory; D013315:Stress, Psychological; D013731:Territoriality; D013816:Thermodynamics