Please enable JavaScript.

Coggle requires JavaScript to display documents.

Zygote (2 cells (4 cells (16-cell morula (inner cell mass (embryoblast…

- - - - inner cell mass
        
        embryoblast
        
        epiblast
        
        amnioblast
        
        amniotic cavity
        
        hypoblast
        
        Heuser membrane
        
        primitive yolk sac
        
        extraembryonic mesoderm
        
        3 more items...
        
        additional cells that migrates along the inside of exocoelomic (Heuser) membrane
        
        secondary yolk sac
      - outer cell mass
        
        trophoblast
        
        cytotrophoblast
        
        proliferate locally
        
        penetrate
        
        .
        
        1 more item...
        
        syncytiotrophoblast