||Embryonic stem cells are easy to grow in the lab but
can develop into tumours. Adult stem cells are a little more difficult
to grow in the lab but don't produce tumours.
||There's a debate on whether to use adult or embryonic
stem cells to cure illnesses
||A patient's own stem cells would produce tissues with
no genetic problems of acceptance, but these are dificult to isolate.
||There's an ethical debate on this issue: curing illnesses
using embryos and respecting human life are in conflict.
||Stem cells generate tissues; embryonic stem cells are
pluripotent (can produce any tissue); adult stem cells are taken from
a particular tissue but can also produce a different tissue.
||There're different opinions on when human life starts,
but it's a fact that to collect the embryonic stem cells the embryo
has to be destroyed.
||Embryonic stem cells are not the only useful ones. Adult
stem cells can also do it.
||Some think cloning is necessary.
||The controversy exists because to get embryonic stem
cells you have to create an embryo and then destroy it, when a human
life has started.
||Specific cells can be transplanted to people suffering
from illnesses such as diabetes