Gastrulation is the stage in the early embryonic development of most animals, during which the blastula (a single-layered hollow sphere of cells), or in mammals the blastocyst, is reorganized into a two-layered or three-layered embryo known as the gastrula. [1]

2023年4月23日 · Gastrulation is an early developmental process in which an embryo transforms from a one-dimensional layer of epithelial cells, a blastula, and reorganizes into a multilayered and multidimensional structure called the gastrula.

2023年8月3日 · During gastrulation, the bilaminar embryonic disc is converted into a trilaminar embryonic disc. Extensive cell shape changes, rearrangement, movement, and alterations in adhesive properties contribute to the process of gastrulation. The embryo during this stage is called a gastrula.

2024年11月23日 · The blastula is usually a spherical layer of cells (the blastoderm) surrounding a fluid-filled or yolk-filled cavity (the blastocoel). Mammals at this stage form a structure called the blastocyst, characterized by an inner cell mass that is distinct from the surrounding blastula.

2021年2月9日 · In the 3rd week of embryonic development, the cells of the bilaminar disk (epiblast and hypoblast) undergo a highly specialised process called gastrulation. During this process, the two cell layers become three germ cell layers, and the bodily axes observed in the mature adult are created.

3 天之前 · The term gastrulation means the formation of gut (Greek, gastrula = belly), but has now a more broad sense to to describe the formation of the trilaminar embryo. The epiblast layer, consisting of totipotential cells, derives all 3 embryo layers: ectoderm, mesoderm and endoderm.

gastrula, early multicellular embryo, composed of two or more germinal layers of cells from which the various organs later derive. The gastrula develops from the hollow, single-layered ball of cells called a blastula which itself is the product of the repeated cell division, or cleavage, of a fertilized egg. This cleavage is followed by a ...

The embryo in this stage of development is called a gastrula. The cavity of it (formed due to invagination of endoderm and mesoderm) is called primary gut or archenteron and its opening to the exterior is called the blastopore.