1. Embrionális fejlődés

3. Emberben nem!!!

4. Two-cell stage 1. Zona pellucida 2. Blastmere
Four-cell stage
Morulla
Blastocyst 1. Outer cell mass or trophoblast 2. Blastocyst cavity 3. Inner cell mass or embryoblast

8. Blastocyst - day 12 1. Syncytiotrophoblast 2. Trophoblastic lacunae 3
Blastocyst - day Syncytiotrophoblast 2. Trophoblastic lacunae 3. Surface epithelium 4. Fibrin coagulum 5. Epiblast 6. Aminotic cavity 7. Hypoblast 8. Cytotrophoblast 9. Exocoelomic cavity

13. Derivatives of the mesoderm – day 1
1 . Amniotic cavity 2 . Mesoderm 3 . Notochord 4 . Ectoderm 5 . Endoderm