1. Circulatory system
2. Nervous system
3. Muscular system
4. Skeletal tissue
Nervous system
1. Heart and notochord
2. Heart and brain
3. Spinal cord and notochord
4. Brain and notochord
Heart and notochord
1. Neurogenesis
2. Notogenesis
3. Hepatogenesis
4. Cardiogenesis
Notogenesis
1. Ingression
2. Involution
3. Inversion
4. Epiboly
Involution
1. Telolecithal
2. Mesolecithal
3. Centrolecithal
4. Oligolecithal
Telolecithal
1. Archenteron
2. Yolk plug
3. Yolk sac
4. Grey crescent
Yolk plug
1. 4
2. 3
3. 1
4. 2
3
1. Amnion
2. Allantois
3. Chorion
4. Placenta
Amnion
1. Fish,amphibians and birds
2. Amphibians,reptiles and birds
3. Reptiles,birds and mammals
4. Only mammals
Reptiles,birds and mammals
1. Epiboly
2. Emboly
3. Delamination
4. Differentiation
Delamination