1
Q
what are stem cells
A
cells which divide repeatedly over a long period of time to produce cells that then differentiate
2
Q
what are embryonic stem cells
A
the cells of an early-stage embryo which can produce any type of specialized cells
3
Q
what are adult stem cells
A
cells that can only produce the type of specialized cells that is in the tissue around them
4
Q
what do adult stem cells do
A
allow the tissue to grow and replace old or damaged cells
