Search Sitemap   
Nederlands    
Afzender
Radboud universityFaculty of ScienceBiologyHOMEIMAGE GALLERY > Search in gallery

Search in gallery

Back to Medium sized version | Without labels

Embryology of sea urchin: early gastrula (initial phase)

Legend:

ectoderm
begin of archenteron
endoderm
blastoecoel (central)
direction of invagination

English name: Sea urchin
Scientific name: Psammechinus sp.
Familia: Echinidae
Classis: Echinoidea
Phylum: Echinodermata
Regnum: Animalia

Blastomeres migrate from the vegetal pole inward during the so-called invagination or gastrulation process (according to the direction of the arrows at 5). In this way the ecto- and endoderm are formed. The endoderm covers the developing primitive gut, called archenteron (arche = original - primitive, enteron = gut).
To next stage.
One stage back.


last modified: 5 Jun 2014