Jul 13 2007
Dying cells
The average age of cells in your body is 7 to 10 years [*]. The resulting question might in reality turn out to be naive, but it does strike you immediately; “If all our cells are replaced eventually, how are we the same person after 10 years?”
Also, even though the number of cells in the body keeps changing, the size of your body is in direct proportion to the number of cells in it. This is, of course, true for animals too.
[*]: NYT
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