Stem cells

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 Stem cells are undifferentiated biological cells capable of self-renewing through division and differentiating into specialized cell types, such as muscle, blood, or nerve cells.

 As the body's repair system, they exist as embryonic (pluripotent) or adult (multipotent) cells. They are critical for tissue regeneration and are used therapeutically in treatments like bone marrow transplants for cancer.

While promising, stem cell therapy faces challenges regarding safety, controlling differentiation, and ethical considerations surrounding embryonic sources.

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