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(resident science nerd here)
All of our bodies cell's are constantly being replaced, except for our brain cells. (our brain cells can regrow, but they are not actively replaced like every other part of our body). Every single blood cell you carry inside you will be gone and replaced by a new blood cell created in yr bone marrow, every 6-7 WEEKS. Every muscle/skin/nerve cell in your body will also replace itself at a rate between 8 weeks to 3 months. The physical, corporeal YOU that sits at the computer today is not the same YOU that sat there half a year ago, LITERALLY. many of the atoms in our cells are re-used or re-absorbed and used for other purposes, but many are lost in our sweat, exhalations, piss, shit, sloughed off skin (each human sloughs off 2-4 POUNDS of material every single DAY, hair and skin cells mostly). 90% of the dust in your home comes from the human cells.
rob's a nerd
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