3. Cleavage in Chick Embryo
Cleavage 1 Cleavage 2
Zygote Two Blastomeres four Blastomeres
Cleavage 3,4,5
Area Opaca Sixteen
Blastomeres
Area Pellucida
Blastoderm
4. Gastrulation in Chick
Yolk
Blastoderm elogated
Blastodisc or
Blastoderm
blastocoel epiblast
hypoblast