Theiler Stage 8 - Differentiation of Egg Cylinder
Home Atlas Database Resources Contact Site Search
Previous Stage
Stage Index
Stage Criteria
 Anatomy
Next Stage

Theiler Stage 8 - Differentiation of egg cylinder

Implantation site 2x3mm. The maternal tissue is invaded by trophoblast (primary) giant cells and the ectoplacental cone is invaded by maternal blood. Differentiation of the egg cylinder into embryonic and extraembryonic regions and the formation of the proamniotic cavity. Reichert's membrane, which is non-cellular and secreted by the distal endoderm first appears.  

6 dpc (range 5-6.5) 
Witschi Stage 10-11 (rat) 
Carnegie Stage 5 (human)

Scale bar in microns.
 
Previous Stage
Stage Index
Next Stage
Web page contact: genexweb@hgu.mrc.ac.uk Last modified:
20/09/2002
Copyright © 1994-2003 The Medical Research Council & University of Edinburgh. All Rights Reserved.