What are stem cells and why are scientists eager to use them in treating disease?
Stem cells are fast growing, unspecialized cells that can reproduce themselves and grow new organs for the body. All 210 different types of human tissue originate from these primitive cells. Because they have the potential to grow into almost any kind of tissue—including nerves, bones, and muscle, scientists believe that the introduction of healthy stem cells into a patient may restore lost function to damaged organs, especially the brain.
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