/sci/ - Science & Math

my only long-tingue picture.
And not x-rated.
so Im postin it beetchez.

>>3983453
the human body does always create new cells as old ones die, but the body does not keep re-creating ALL the cells, nor does it re-create them at the same rate

the main cells constantly produced are red blood cells, which is the bilirubin that makes your shit brown
http://en.wikipedia.org/wiki/Bilirubin

some working surfaces of internal organs also have a very high rate of turnover, but other cells like those of the inner ear do not.

i dunno what the longest-living human cell is, but remember that womens egg cells can be impregnated when they are 60+ years old. it is not known what the outer limit on human egg cells is ,,,,,,, the problems with older women getting pregnant is other related but external physiological factors, not any problem of age within the egg cell itself