- Embryonic stem cells (from human embryos) and adult stem cells (from adult bone marrow can be made to differenciate into many different types of cell.
- Stem cells have the potential to treat previously incurable conditions. We may be able to grow nerve cells or whole new organs for people who need them.
- An egg and sperm cell fuse to form a zygote, a single new cell. That cell divides and becomes a…