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- الكيسة ثنائية الصفائح أو القرص الثنائي الطبقات يشير إلى الأديم الخارجي والأريمة التحتانية، التي تطورت من كتلة الخلايا الداخلية. وهاتان الطبقتان تنحشر بين اثنين من البالونات: الكيس المحي البدائي والتجويف الذي يحيط بالجنين. (ar)
- The bilaminar embryonic disc, bilaminar blastoderm or embryonic disc is the two-layered structure of epiblast and hypoblast, differentiated from the inner cell mass also known as the embryoblast. These two layers of cells lie between two cavities: the primitive yolk sac and the amniotic cavity. The inner cell mass, begins to transform into two distinct epithelial layers just before implantation is completed. The epiblast, also known as the primitive ectoderm, is the outer layer that consists of columnar cells. The inner layer is called the hypoblast, also known as the primitive endoderm, which is composed of cuboidal cells. As the two layers become evident, a basement membrane presents itself between the layers. The final two layers of the embryoblast are known collectively as the bilaminar embryonic disc. This bilaminar disc also defines the primitive dorsal ventral axis. Blastocyst implantation will occur during the second week of embryonic development in the endometrium of the uterus; the epiblast is dorsal and the hypoblast is ventral. (en)
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- 10941 (xsd:nonNegativeInteger)
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- Section through the embryo. (en)
- Embryonic disc at implantation site with epiblast expanded to form the amniotic cavity (en)
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- Bilaminar-embryonic-disc-at-14-days-in-the-implantation-site-in-endometrium.png (en)
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- Bilaminar embryonic disc (en)
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- الكيسة ثنائية الصفائح أو القرص الثنائي الطبقات يشير إلى الأديم الخارجي والأريمة التحتانية، التي تطورت من كتلة الخلايا الداخلية. وهاتان الطبقتان تنحشر بين اثنين من البالونات: الكيس المحي البدائي والتجويف الذي يحيط بالجنين. (ar)
- The bilaminar embryonic disc, bilaminar blastoderm or embryonic disc is the two-layered structure of epiblast and hypoblast, differentiated from the inner cell mass also known as the embryoblast. These two layers of cells lie between two cavities: the primitive yolk sac and the amniotic cavity. (en)
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- Bilaminar embryonic disc (en)
- كيسة أريمية ثنائية الطبقات (ar)
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- Bilaminar embryonic disc (en)
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