stem cells

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Across
  1. 3. Ball of unspecialised stem cells
  2. 4. Inner layer of the three germ layers
  3. 6. cell Has potential to become many specialised cells overtime
  4. 10. Can develop into several different cell types
  5. 11. Outside layer of the three layers
  6. 12. can only differentiate into one cell type
Down
  1. 1. contains cluster of cells known as inner cell mass
  2. 2. Can self renew for long periods of time
  3. 5. The middle layer of the three germ layers
  4. 7. Can create any cell type or embryo
  5. 8. differentiation Process by embryonic cell becomes specialised
  6. 9. occurs about day 12