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 6.3 Growth and development

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At birth we weigh some 3.3kg, and we are 500mm in length, of which our trunks represent some 70%. In the two decades that follow, our body length increases between three- and fourfold, our weight increases around 20-fold and our linear proportions change so that in the adult state the length of the trunk accounts for only 52% of the stature. However, the adult condition is by no means stationary ¡V our bodily proportions are modified by our lifestyles and the inevitable process of ageing.
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