Stem cells are found in the bone marrow of adults and in the umbilical cord of children. Stem cells replace damaged cells with new repaired cells to keep the body healthy. Stem cells can be specialized to any function in the body when you are a child which are the embryonic stem cells, and once you are an adult stem cells are less likely to be able to specialize in any function, but more likely any function in one area of the body. Research is being conducted with mice after they receive radiation therapy stem cells are implanted into them, and the results have shown that the stem cells have increased cognitive functions.
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