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The fact we are not ill more often is due to the remarkable capacity our bodies have to revert to a state of ‘homeostasis’ – a somewhat dull word provided by Walter Cannon in the early 20th century to summarise the work of the physiologist Claude Bernard who was based in Paris in the 1850s. It has dominated biology, physiology and medicine ever since. Homeostasis is regularly used to describe the exquisite intrinsic ability we possess to respond to, counteract and adapt to external and internal sources of damage and disturbance to maintain health/function in us and other living organisms.

A more contemporary – albeit controversial term to describe this is: ‘Homeodynamics’.[1] This is the concept that we are not static but constantly adapting. Homeodynamics, accounts for the fact that the internal milieu of complex biological systems is not permanently fixed, is not at equilibrium, and is subject to dynamic regulation and interaction among various levels of organisation. Aging, senescence and death are the final manifestations of unsuccessful homeodynamics and in utero exposure represents the first opportunity and experience  for remodelling and constant adaptation.

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