Through the process of gastrulation, the bilaminar embryonic disc becomes trilaminar.
2.
The embryonic disc now lies between the amniotic cavity and the primary yolk sac.
3.
Through the process of neurulation, the notochord induces the formation of the neural tube in the embryonic disc.
4.
Histologically, embryonal carcinoma appears similar to the embryonic disc, made up of epithelial, anaplastic cells in disorganized sheets, with gland-like spaces and papillary structures.
5.
The final two layers of the embryoblast are known collectively as the "'bilaminar embryonic disc "'as well as the "'bilaminar blastocyst "'or "'bilaminar blastoderm " '.
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