Former term for endoderm.
- The prospective endoderm displaces the hypoblast and the mesoderm forms a layer between ectoderm and endoderm.
- Why is the origin of mesoderm from hypoblast in some groups not regarded as a secondary adaptation?
- Why then, asks Balfour, are hypoblast and epiblast continuous?
For editors and proofreaders
Line breaks: hypo|blast
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