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The bilaminar embryonic disc, bilaminar blastoderm or embryonic disc is the distinct two-layered structure of cells formed in an embryo. In the development of the human embryo this takes place by day eight. It is formed when the inner cell mass, also known as the embryoblast, forms a bilaminar disc of two layers, an … 展开
The one-celled zygote, a eukaryotic cell formed by a fertilization event between two gametes at the start of embryonic development, undergoes cleavage by mitosis as it travels through the fallopian tube to the 展开
The process of the formation of the gestational sac (chorionic cavity or extraembryonic coelom) and the yolk sac (umbilical vesicle) is still debated. The main theory states that formation of the membranes of the yolk sac begins with an increase in production of … 展开
Beginning on day eight, the amniotic sac is the first new cavity to form during the second week of development. Fluid collects between the epiblast and the hypoblast, which splits the … 展开
In the third week, gastrulation begins with the formation of the primitive streak. Gastrulation occurs when pluripotent stem cells differentiate into the three germ cell layers: 展开
CC-BY-SA 许可证中的维基百科文本 2ª Semana do desenvolvimento embrionário - Etapas
O embrião de 14 dias mantém a forma de disco embrionário plano bilaminar, no final da segunda semana. A placa pré-cordal espessada se desenvolve como um espessamento localizado no hipoblasto. Ela indica o futuro local da boca e …
El disco embrionario y su formación - Portal de Salud
2019年2月16日 · El disco embrionario es un grupo de células que se crea en la 2ª semana de gestación y que se transforma en el feto. El disco embrionario bilaminar es la primera fase, con dos capas de tejido, y se produce el …
27.3B: Bilaminar Embryonic Disc Development
bilaminar: Formed of, or having, two laminae, or thin plates. The floor of the amniotic cavity is formed by the embryonic disc, which is composed of a layer of prismatic cells and the embryonic ectoderm. It is derived from the inner cell …
Bilaminar Embryonic Disc - Cellular Development, Function
The bilaminar embryonic disc is formed when the inner cell mass forms two layers of cells, separated by an extracellular basement membrane. The external layer is called the epiblast …
Terceira Semana do Desenvolvimento Embrionário
Após a primeira e a segunda semanas de desenvolvimento embriológico, no início da 3ª semana de gestação, a massa de células já se diferenciou em um disco bilaminar com uma cavidade amniótica e uma cavidade exocelômica. O …
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The bilaminar germ disk (2nd week) | embryology.ch
The development of the bilaminar germ disk and the establishment of a feto-maternal blood circulation system were given in detail in the placenta placenta and implantation modules. In …
the bilaminar embryonic disc is slow compared with growth of the trophoblast (see Figs. 3-1 and 3-2). The implanted 12-day embryo produces a minute elevation on the endometrial surface …
Bilaminar Blastocyst | Encyclopedia MDPI
2022年10月19日 · Bilaminar blastocyst or bilaminar disc refers to the epiblast and the hypoblast, evolved from the embryoblast. These two layers are sandwiched between two balloons: the …
Bilaminar - Pontificia Universidad Católica de Chile
El disco bilaminar es el resultado de la diferenciación del epiblasto e hipoblasto del embrioblasto. Conoce los procesos de formación del saco vitelino, el mesodermo, el celoma y el saco …
