2. Seminiferous Tubules (human)

4. Ovary (cat)

5. Ovum (squirrel)

6. Primordial Follicle (human)

7. Secondary Follicle (human)

8. Addition of Yolk to Oocyte by Follicle Cells

9. Maturing Secondary Follicle (monkey)

10. Secondary Ooocyte in Antral Follicle (human)

11. Oogenesis – formation of polar bodies (rat, human, and mouse, respectively)

12. Meiosis http://biology-web.nmsu.edu/houde/MEIOSIS.mov (Click on the link to run the animation) (Close the movie window to return to this presentation)

13. Frog (Xenopus) Oogenesis http://biology-web.nmsu.edu/houde/frogoogenesis.mov

14. Fertilization - Acrosome Reaction and Cortical Reaction

15. Sea Urchin rhodamine phalloidin staining of fertilization cone (explosive actin polymerization) http://biology-web.nmsu.edu/houde/Rhphalloidinstainingfertilizationcone.mov

16. Inositol triphosphate (IP3) is a second messenger released from phosphatidyl inositol bisphosphate (PIP) by phospholipase C, and binds to and activates a calcium channel in the endoplasmic reticulum, releasing a wave of Ca ++ that spreads across the ovum. Calcium ion stimlates the release of cortical granules to the perivitelline space, which widens as a slow block to polyspermy and deactivates bindin receptors.

17. Sea Urchin Cortical Reaction phase contrast left intracellular Ca ++ right http://biology-web.nmsu.edu/houde/mk0780641001.mov

18. Sea Urchin fusion of egg and sperm pronuclei http://biology-web.nmsu.edu/houde/ Fusioneggspermpronuclei.mov

19. Ascidean Cortical Rotation

20. frog (Xenopus) cortical rotation (follows gravitational rotation) http://biology-web.nmsu.edu/houde/ corticalrotation.mov

21. frog (Xenopus) gravitational rotation, Cleavage http://biology-web.nmsu.edu/houde/ fert2.mov

22. Branchiostoma Cleavage and Blastulation

23. Xenopus Blastulation

24. frog (Xenopus) Blastulation http://biology-web.nmsu.edu/houde/ xenopus embryo.mov

26. Branchiostoma Gastrulation

27. Xenopus Zygote Cytoplasmic Fate Map

28. Xenopus median section blastulation – bottle cells

29. Xenopus Vegetal and Median Gastrulation

30. Frog (Xenopus) Gastrulation, formation of yolk plug, Neurulation http://biology-web.nmsu.edu/houde/ RKellergastrulation.mov

31. Xenopus Median and Parasagittal Gastrulation

32. Frog (Xenopus) Gastrulation – median optical section http://biology-web.nmsu.edu/houde/ froggastmedianopticalsection.mov

33. Keller sandwich Cutout (frog) http://biology-web.nmsu.edu/houde/ sandwich_cutout.mov

34. Keller sandwich explant (chordaneural elongation) http://biology-web.nmsu.edu/houde/ Kellersandwichdorsallipexplant.mov

35. Branchiostoma Neurulation

36. Xenopus Neurulation