Examples of gastrulation in the following topics:
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- Gastrulation takes place after cleavage and the formation of the blastula and the primitive streak.
- In amniotes such as humans, gastrulation occurs in the following sequence:
- The molecular mechanism and timing of gastrulation is different in different organisms.
- However, some common features of gastrulation across triploblastic organisms include:
- Although gastrulation patterns exhibit enormous variation throughout the
animal kingdom, they are unified by the five basic types of cell
movements that occur during gastrulation:
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- Following gastrulation, the neurulation process develops the neural tube in the ectoderm, above the notochord of the mesoderm.
- It follows gastrulation in all vertebrates.
- During gastrulation cells migrate to the interior of the embryo, forming the three germ layers: the endoderm (the deepest layer), the mesoderm (the middle layer), and the ectoderm (the surface layer) from which all tissues and organs will arise.
- After gastrulation, the notochord—a flexible, rod-shaped body that runs along the back of the embryo—is formed from the mesoderm.
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- The formation of the bilaminar embryonic disc precedes gastrulation.
- As gastrulation progresses, the embryonic disc becomes trilaminar and the notochord is formed.
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- It follows gastrulation in all vertebrates.
- During gastrulation cells migrate to the interior of embryo, forming three germ layers— the endoderm (the deepest layer), mesoderm, and ectoderm (the surface layer)—from which all tissues and organs will arise.
- After gastrulation, the notochord—a flexible, rod-shaped body that runs along the back of the embryo—has been formed from the mesoderm.
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- After gastrulation, neural crest cells are specified at the border of the neural plate and the non-neural ectoderm.
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- Before gastrulation, the cells of the trophoblast become differentiated into two strata.
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- This early embryonic form undergoes gastrulation, forming a gastrula with either two or three layers (the germ layers).
- During gastrulation, some of the cells migrating inward contribute to the mesoderm, an additional layer between the endoderm and the ectoderm.
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- Some researchers have found that cells with hemangioblast properties have been located in the posterior end of the primitive streak during gastrulation.
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- This layer of trophoblasts is also collectively referred to as the trophoblast, or, after gastrulation, the trophectoderm, as it is then contiguous with the ectoderm of the embryo.