1. Bilaminar embryo. Formation of ecto- and endoderm.
Dr. Altdorfer

2.
Online course in embryology for medicine students universities of Fribourg, Lausanne, Bern
with the support of the Swiss Virtual Campus

4. embryoblast
Immunological defence
blastocoel
Blastula, blastocyst

7. Operculum

8. blastula

9. embryoblast

11. Amnion-fluid (mech. protection)
Primary yolk sac

16. hCG

17. --> Chorionic plate

18. Extraembr.
somatopleura
Extraembr.
splanchnopleura

19. Bilaminar embryo

20. Embryonic disc
Epiblast  all the 3 germ layers!!

21. Epiblast  all the 3 germ layers!!
Cloaca-membran

23. all embryonic tissues derive
from the epiblast

26. Embryo, amnion
Yolk sac
Placenta