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B0b-A
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What fraction of adult human cells are not replaced over a normal lifetime ?.
see ... http://en.wikipedia.org/wiki/Ship_of_Theseus / [ aka "Trigger's broom" ].
I'm guessing it's a minority : brain and heart only account for about 3% of body weight.[ skeleton is replaced every decade , but that's only 14% of body weight ]
[ apparently average age of muscle cell is 15 years ]
see ... http://en.wikipedia.org/wiki/Ship_of_Theseus / [ aka "Trigger's broom" ].
I'm guessing it's a minority : brain and heart only account for about 3% of body weight.[ skeleton is replaced every decade , but that's only 14% of body weight ]
[ apparently average age of muscle cell is 15 years ]
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