Blue = ectoderm
White = blastocoel and yolk
Purple = hypoblast
P
A
(transverse section)
The epiblast (ectoderm) is separated from the hypoblast by the
blastocoel. The epiblast will give rise to the three germ layers of
the embryo, while the
hypoblast will give rise
to extraembryonic
structures.
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