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GASTRULA PERIOD (5 1/4 - 10 h) ... Just as there was no blastocoele during the blastula period, there is no archenteron in the gastrula. Neither is there a blastopore; DEL cells involute at the blastoderm margin, which thus plays the role of a blastopore.
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zfin.org/zf_info/zfbook/stages/gast.html
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Stages During the Gastrula Period ... Hence, it is important to distinguish these early gastrula stages by examining the thickness at and along the marginal region of the blastoderm. At this 50%-epiboly stage radial intercalations have produced a blastoderm that is very uniform in thickness (Fig.
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zfin.org/zf_info/zfbook/stages/gast_stgs.html
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An echinoderm gastrula. It was formed by the invagination of blastomeres at the vegetal pole area of the blastula to produce the archenteron, which will become the digestive system.The opening into the archenteron is the blastopore, which will become the anus of the adult.
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www.daviddarling.info/encyclopedia/G/gastrula.html
www.daviddarling.info/encyclopedia/G/gastrula.html
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Sexual reproduction: a costly process ... Gastrula: Early embryo with 3 tissue layers. All cells have the same DNA; however, different cells now begin to "turn on" (or "express") different genes to become different organs.
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www.biology.iupui.edu/biocourses/N100/2k4ch39repronotes...
www.biology.iupui.edu/biocourses/N100/2k4ch39repronotes.html
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Gastrula - Definition of Gastrula at Dictionary.com a free online dictionary with pronunciation, synonyms, and translation of Gastrula. Look it up now! ... Plural gastrulas or gastrulae (gās'trə-lē') ; An animal embryo at the stage following the blastula. The gastrula develops from the blastula by invagination (inpocketing),
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dictionary.reference.com/browse/gastrula
dictionary.reference.com/browse/gastrula
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gastrula stage (Drosophila development) LOOM amirg 08/13/09 View Notes ... Gastrula (NCI Thesaurus) LOOM amirg 08/13/09 View Notes ... gastrula | Link Here | Subscribe...
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bioportal.bioontology.org/virtual/1095/XAO:1000005
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In addition, our results show that neural specification requires the continuous activity of BMP antagonists from blastula through gastrula stages.
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www.cell.com/current-biology/abstract/S0960-9822(07)009...
www.cell.com/current-biology/abstract/S0960-9822(07)00988-8
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We found also that preventing cytoplasmic acidification and thereby elevating pHi in late gastrula cells led to the specific suppression of posterior development. Neural induction and anterior development were unaffected by treatments leading either to an elevation of or a decrease in pHi.
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dev.biologists.org/cgi/content/abstract/121/6/1911
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these `rogue' cells are largely undetectable by late gastrula stages, suggesting that they are either converted to the fate of their neighbors, or eliminated via as yet uncharacterized mechanisms.
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dev.biologists.org/cgi/content/full/132/12/2733
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