Operation of the
stem cell supply chain is an essential mechanism of life Human Body is in a State of Constant Flux
Intestinal epithelial cells
5 days
Fat
cells
10%
a year
Liver
cells
300-500 days
Epidermus4 weeks
Human skeleton
10 years
Gut
15.9 years
Muscle
15.1 years
Red
blood cells
2weeks
Heart
45% through the life
50-70 million cells are discarded and new ones
are generated daily
Frisen
et. al Cell, 2005
Science, 2009
Slide by V. Lunyak
Although people
may think of their body as a fairly permanent structure, most of it is in a
state of constant flux as old cells are discarded and new ones generated in
their place. Each kind of tissue has its own turnover time, depending in part
on the workload endured by its cells. Adult
stem cells are at the core of your body's natural renewal ハsystem