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  1. Stem cell | Definition, Types, Uses, Research, & Facts | Britannica

  2. Visual Guide to Human Cells - ALLEN CELL EXPLORER

  3. 30.3: Stems - Stem Anatomy - Biology LibreTexts

  4. 8 The Cell Cycle and Mitosis - Open Educational Resources

  5. Biology of stem cells: an overview - PMC - PubMed Central (PMC)

  6. Stem cell - Wikipedia

  7. Stem Cell - The Definitive Guide - Biology Dictionary

  8. Schematic diagram of the stem cell niche showing the stem cells

  9. Adult stem cell - Wikipedia

  10. Stem Cells- Definition, Properties, Types, Uses, Challenges