1. Video 20.1 Early cell division in an eleven-armed sea star (Coscinasterias muricata) embryo

2. Video 20.2 Gastrulation in an eleven-armed sea star (Coscinasterias muricata) embryo

3. Video 20.3 Gastrulation and neurulation in a frog, Xenopus

4. Video 20.4 Human fetal development

5. Video 20.5 From egg to tadpole: Embryonic development in a frog, Xenopus

6. Video 20.6 Embryogenesis of a nematode worm, C. elegans

7. Video 20.7 Embryonic development in two zebrafish

8. Video 20.8 Blood vessel development