Stem cells

 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. SANCHITA CHATTERJEE

 Ability to divide and renew themselves for long periods and transform into specialized cells with specific functions.

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