KNESIOLOGY 142 GROWTH AND DEVELOPMENT CraigAsmundson I. Nature of Growth Growth - "the progressive development of a living being or part of an organism from its earliest stage to maturity, including the attendant increases in size". Growth involves a series of changes not just the addition of material to achieve an increase in size. These changes involve a differentiation of various parts of the body to perform different functions. Not all parts of the human body grow at the same rate, nor do they all stop growing simultaneously. The body does not retain the same proportions throughout growth and the relative weights of given tissues and organs do not remain constant. For example, the brain at birth is about 24 Yo of iIs adult weight, whereas the neonatal bofu is only about 6 % of its adult weight. Extremely rapid growth of the brain continues, so that by the time the child is five years old the brain has reached 90 % of its adult weight, whereas its body weight is only 25 oh of its eventual adult weight. The reproductive organs, on the other
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This note was uploaded on 12/29/2011 for the course KIN 142 taught by Professor Asmundson during the Fall '09 term at Simon Fraser.