When a stem cell divides, each new cell has the potential to either remain a stem cell or become another type of cell with a more specialised function.

Scientists believe it should be possible to harness this ability to turn stem cells into a super "repair kit" for the body.

Theoretically, it should be possible to use stem cells to generate healthy tissue to replace that either damaged by trauma, or compromised by disease.

Among the conditions which scientists believe may eventually be treated by stem cell therapy are Parkinson's disease, Alzheimer's disease, heart disease, stroke, arthritis, diabetes, burns and spinal cord damage.

Stem cells may also provide a useful way to test the effects of experimental drugs.

It is also hoped that studying stem cells will provide vital clues about how the tissues of the body develop, and how disease takes hold.

(Source: BBC)