All the cells in your body came from a ____ egg cell. The fertilised egg (also called a ____) divided by ____ to form an embryo. Cells in an embryo are not ____. They can ____ into any kind of body cell. These undifferentiated cells are called ____ cells. We can get stem cells from embryos and from some adult tissues such as bone ____ and ____ pulp. In the future, stem cells may be used to treat some conditions such as ____ and paralysis.

Stem Cells

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