1. Embryonic development & stem cells bits & pieces, not really in your textbook

2. Once upon a time… Engraving by Hartsoecker, 1694

3. But, of course, it takes two gametes for fertilization What is an embryo?

4. Two major phases of embryonic development Cleavage Gastrulation

5. Cleavage phase

6. blastocyst

7. Gastrulation phase

10. After gastrulation Also called organogenesis

11. Mitosis & apoptosis

12. Cell differentiation

13. Stem cells are undifferentiated cells

14. Stem cell differentiation

15. Two types of stem cells Embryonic Adult

17. Stem cells & research Embryonic Adult

19. There are technical hurdles… For stem cell therapies to be successful, stem cells need to...

20. There are ethical hurdles… The harvesting of embryonic stem cells destroys the embryo And/but...