Epiblast
The epiblast is a part of the early embryo during embryonic development in mammals . At a very early stage, the epiblast is formed from the part of the embryoblast that is adjacent to the trophoblast and thus to the mother's uterine wall. The side of the embryoblast facing the blastocyst cavity , on the other hand, differentiates itself into the flat-cell hypoblast .
The epiblast consists of a prismatic epithelium that lines the primary amniotic cavity that forms between the epiblast and the trophoblast with the so-called amnioblasts . This then becomes the secondary amniotic cavity. In addition, the three germ layers ( endoderm , ectoderm and mesoderm ) emerge from the epiblast during gastrulation .
supporting documents
- ↑ a b Hartmut Greven: Reproduction and Development. In: W. Westheide, R. Rieger: Special Zoology. Part 2: vertebrates or skulls. Spektrum, Munich 2004, ISBN 3-8274-0307-3 , pp. 163-164.
- ↑ epiblast. In: Herder-Lexikon der Biologie. Spektrum Akademischer Verlag, Heidelberg 2003, ISBN 3-8274-0354-5 .