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The notion of system (or apparatus) relies upon the concept of vital or organic function: a system is a set of organs with a definite function. This idea was already present in Antiquity (Galen, Aristotle), but the application of the term "system" is more recent. For example, the nervous system was named by Monro (1783), but Rufus of Ephesus (c. 90-120), clearly viewed for the first time the brain, spinal cord, and craniospinal nerves as an anatomical unit, although he wrote little about its function, nor gave a name to this unit.
The enumeration of the principal functions - and consequently of the systems - remained almost the same since Antiquity, but the classification of them has been very various, e.g., compare Aristotle, Bichat, Cuvier.
The notion of physiological division of labor, introduced in the 1820s by the French physiologist Henri Milne-Edwards, allowed to "compare and study living things as if they were machines created by the industry of man." Inspired in the work of Adam Smith, Milne-Edwards wrote that the "body of all living beings, whether animal or plant, resembles a factory ... where the organs, comparable to workers, work incessantly to produce the phenomena that constitute the life of the individual." In more differentiated organisms, the functional labor could be apportioned between different instruments or systems (called by him as appareils).
It from bit and fit from bit. On the origin and impact of information in the average evolution. Includes how life forms and biological systems originate and from there evolve to become more and more complex, including evolution of genes and memes, into the complex memetics from organisations and multinational corporations and a "global brain", (Yves Decadt, 2000). Book published in Dutch with English paper summary in The Information Philosopher, http://www.informationphilosopher.com/solutions/scientists/decadt/
Schmidt-Rhaesa, A. 2007. The Evolution of Organ Systems. Oxford University Press, Oxford, .
^F. Muggianu; A. Benso; R. Bardini; E. Hu; G. Politano; S. Di Carlo (2018). "Modeling biological complexity using Biology System Description Language (BiSDL)". 2018 IEEE International Conference on Bioinformatics and Biomedicine (BIBM). IEEE Xplore Digital Library. pp. 713-717. doi:10.1109/BIBM.2018.8621533. ISBN978-1-5386-5488-0.
^ abFletcher, John (1837). "On the functions of organized beings, and their arrangement". In: Rudiments of physiology. Part 2. On life, as manifested in irritation. Edinburgh: John Carfrae & Son. pp. 1-15. link.
^Swanson, Larry (2014). Neuroanatomical Terminology: A Lexicon of Classical Origins and Historical Foundations. Oxford: Oxford University Press. link. p. 489.
^Bichat, X. (1801). Anatomie générale appliquée à la physiologie et à la médecine, 4 volumes in-8, Brosson, Gabon, Paris, link. (See pp. cvj-cxj).