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  Encyclopedia of Keywords > Nature > Life > Animals > Gastrulation   Michael Charnine

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  1. Gastrulation is a crucial time in the development of multicellular animals.
  2. Gastrulation is a phase early in the development of animal embryos, during which the morphology of the embryo is dramatically restructured by cell migration.
  3. Gastrulation is a vital stage for cloned embryos. (Web site)
  4. Gastrulation is the differentiation of animal tissues into germinal layers. (Web site)
  5. Gastrulation is a dramatic restructuring of the animal embryo during the gastrula phase. (Web site)

During Gastrulation

  1. During gastrulation, some of the cells migrating inward contribute to the mesoderm, an additional layer between the endoderm and the ectoderm. (Web site)
  2. The primary germ layers (endoderm, mesoderm, and ectoderm) are formed and organized in their proper locations during gastrulation. (Web site)
  3. It is also directly involved in the formation of the mesoderm and definitive endoderm at the primitive streak during gastrulation [ 3]. (Web site)


  1. During gastrulation, embryonic cells migrate through an opening within the embryo known as a blastocoel. (Web site)
  2. This early embryonic form undergoes a massive reorganization called gastrulation forming a gastrula with either two or three layers (the germ layers).
  3. Gastrulation is followed by organogenesis, when individual organs develop within the newly formed germ layers. (Web site)
  4. During gastrulation cells migrate to the interior of the blastula, consequently forming two (in diploblastic animals) or three ( triploblastic) germ layers.
  5. Thus, by the end of gastrulation, all three germ layers are formed.

Vegetal Pole

  1. During microlecithal gastrulation, a blastula with a relatively large blastocoel is usually formed. (Web site)
  2. At the beginning of vertebrate gastrulation, the embryo is a hollow ball of cells known as the blastula, with an animal pole and a vegetal pole.
  3. The process of gastrulation is affected, as was cleavage, by the amount and the distribution of yolk. (Web site)
  4. The movie shows gastrulation and neurulation viewed from the vegetal pole, the future dorsal side at the top. (Web site)


  1. Formation of the neural tube is the result of an invagination of the ectoderm following gastrulation.
  2. Directed cell rearrangements occur during gastrulation, neurulation, and organ formation. (Web site)
  3. Pre-embryonic development Zygotes through gastrulation: Pre-embryonic development begins with zygote formation and ends with gastrulation. (Web site)
  4. The stage of a vertebrate embryo when gastrulation is largely finished and a neural plate is forming, ending with formation of the neural tube.

Sea Urchin

  1. During gastrulation signal is detected underlying both the ectoderm and the invaginating endoderm. (Web site)
  2. Collinear activation of Hoxb genes during gastrulation is linked to mesoderm cell ingression.
  3. During gastrulation, many of the cells at or near the surface of the embryo move to a new, more interior location. (Web site)
  4. Hardin, 1996 J. Hardin, The cellular basis of sea urchin gastrulation, Curr. (Web site)
  5. Tahinci E, Symes K : Distinct functions of Rho and Rac are required for convergent extension during Xenopus gastrulation. (Web site)


  1. In this study, we find that Wee1 is upregulated by tyrosine autophosphorylation following the MBT and at gastrulation. (Web site)
  2. Instead, we found that gastrulation was profoundly disrupted when M-phase entry was promoted by Wee1 depletion. (Web site)
  3. Morphogenesis during Xenopus gastrulation requires Wee1-mediated inhibition of cell proliferation -- Murakami et al. (Web site)


  1. The end result of gastrulation is an asymmetric involution of cells that form the dorsal structures of the embryo.
  2. Xlpou25 and Xlpou91 continue to be expressed throughout the process of gastrulation but only in cells that have not undergone involution. (Web site)

Xenopus Laevis

  1. Hardin J, Keller R : The behaviour and function of bottle cells during gastrulation of Xenopus laevis. (Web site)
  2. Keller, R. and Danilchik, M. (1988). Regional expression, pattern and timing of convergence and extension during gastrulation of Xenopus laevis. (Web site)
  3. Mesendoderm extension and mantle closure in Xenopus laevis gastrulation: combined roles for integrin alpha(5)beta(1), fibronectin, and tissue geometry. (Web site)

Vegetal Plate

  1. Gastrulation involves a series of cell migrations to positions where they will form the three primary cell layers.
  2. Gastrulation begins in earnest with the ingression of primary mesenchyme cells in the center of the vegetal plate.
  3. ECM 18 appears to be important in the morphogenesis of PMCs and vegetal plate descendants during gastrulation (Berg et al., 1996). (Web site)

Primitive Streak

  1. During gastrulation in birds and mammals, epiblast cells converge at the midline and ingress at the primitive streak. (Web site)
  2. The amniote primitive streak is defined by epithelial cell intercalation before gastrulation.


  1. Before gastrulation begins, the blastoderm forms two layers: the epiblast and the hypoblast.
  2. The second stage of gastrulation occurs when the leading edge of the epibolizing blastoderm thickens.


  1. This results in a temporal gradient of development with the anterior forming organs while the posterior is still going through gastrulation. (Web site)
  2. E, (iii) Invagination of the anterior cells, considered by Schulze (1878) , Hammer (1908) and Duboscq and Tuzet (1937) to be gastrulation. (Web site)


  1. Homologues of Twisted gastrulation are extracellular cofactors in antagonism of BMP signalling.
  2. Analysis of -galactosidase activity in Bmp4 lacZneo embryos reveals that prior to gastrulation, Bmp4 is expressed in the extraembryonic ectoderm. (Web site)


  1. At this point gastrulation is complete, and the gastrula has a functional digestive tube. (Web site)
  2. The endoderm-lined cavity formed during the gastrulation process that develops into the digestive tract of an animal.
  3. The ectoderm forms at the gastrulation stage in embryonic development, when the digestive system is developing.

Primitive Gut

  1. The archenteron is known as the primitive gut that forms during gastrulation in the developing embryo. (Web site)
  2. The archenteron is known as the primitive gut that forms during gastrulation in the developing blastula. (Web site)
  3. During gastrulation, the blastopore is the opening into the primitive gut. (Web site)


  1. The outermost germ layer of the embryo that develops during gastrulation. (Web site)
  2. After gastrulation the notochord ---a flexible, rod-shaped body that runs along the back of the embryo---has been formed from the mesoderm.
  3. This study investigates the role of RhoA during sea urchin gastrulation. (Web site)
  4. In the mouse embryo Tbx6 is expressed in presomitic mesoderm during mouse gastrulation [ 48, 49]. (Web site)
  5. McClay, D. R. and Logan, C. Y. (1996). Regulative capacity of the archenteron during gastrulation in the sea urchin.


  1. At the posterior marginal zone (PMZ), there is a condensation of cells that is important in gastrulation.
  2. Gastrulation in Drosophila: The formation of the ventral furrow and posterior midgut invaginations.


  1. Gastrulation involves changes in cell motility, cell shape, and cell adhesion. (Web site)
  2. Oda, H., Tsukita, S. and Takeichi, M. (1998). Dynamic behavior of the cadherinbased cell-cell adhesion system during Drosophila gastrulation.


  1. As gastrulation proceeds, the primitive groove extends anteriorly. (Web site)
  2. This time-lapse sequence (taken by Ray Keller) shows gastrulation and neuralation in Xenopus. (Web site)
  3. Cleavage and gastrulation in Zebra fish: this time-lapse movie extends from the 1 cell stage to 100% epiboly (~11 hrs elapsed time). (Web site)
  4. Compare this with the geometry of gastrulation in the embryos of frogs and salamanders.
  5. Mlodzik, 2002 M. Mlodzik, Planar cell polarization: do the same mechanisms regulate Drosophila tissue polarity and vertebrate gastrulation?, Trends Genet.


  1. The gastrula phase is marked by a dramatic restructuring called gastrulation.
  2. This video of a living Xenopus (frog) embryo shows both gastrulation and neurulation. (Web site)
  3. Bei Ersteren entwickelt sich der Urmund (Anfang der Gastrulation) zum späteren Mund, bei Letzteren bildet der Urmund den späteren After. (Web site)
  4. Below are schematic diagrams of the major types of cell movements that occur during gastrulation. (Web site)
  5. Visit the University of Wisconsin for an excellent tutorial describing the above and additional terms in Gastrulation: Morphogenetic Movements.


  1. Encyclopedia of Keywords > Nature > Life > Animals
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