A trilaminar embryonic disc, trilaminary blastoderm, or trilaminar germ disk is an early stage in the development of triploblastic organisms, which include...
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the three germ layers of the embryo, so that the bilaminar disc is now a trilaminar disc, the gastrula. The three germ layers are the ectoderm, mesoderm...
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Gestational sac (redirect from Extra-embryonic coelom)
approximately nine weeks of gestational age, due to folding of the trilaminar germ disc, the amniotic sac expands and occupy the majority of the volume of...
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Notochord (section Post-embryonic retention)
to define a species as a chordate. The notochord is derived from the embryonic mesoderm and consists of an inner core of vacuolated cells filled with...
21 KB (2,359 words) - 20:21, 2 July 2024
extraembryonic mesoderm. Initially it lies caudally to the trilaminar germ disc, but, with subsequent embryonic folding, the body stalk assume a more ventral position...
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the definitive ectoderm. The process of gastrulation results in a trilaminar germ disc, consisting of the ectoderm, mesoderm and endoderm layers. Epiblasts...
10 KB (1,200 words) - 21:54, 3 May 2024
The neural fold is a structure that arises during neurulation in the embryonic development of both birds and mammals among other organisms. This structure...
14 KB (1,551 words) - 21:27, 15 May 2024
with the ventral infolding and the subsequent midline fusion of the trilaminar disc, forms a pair of intraembryonic coeloms anterolaterally around the...
20 KB (2,454 words) - 14:31, 21 August 2024