blastula
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Body symmetry is determined at the blastula stage.
From Textbooks ● Jun. 9, 2022
During gastrulation, the blastula folds upon itself to form the three layers of cells.
From Textbooks ● Jun. 9, 2022
After the cleavage has produced over 100 cells, the embryo is called a blastula.
From Textbooks ● Jun. 9, 2022
After further cell division and rearrangement of existing cells, a 6–32-celled hollow structure called a blastula is formed.
From Textbooks ● Jan. 1, 2015
The gastrula, finally, is the two-layered sac formed from the blastula, typically by invagination of its wall.
From Form and Function A Contribution to the History of Animal Morphology by E. S. (Edward Stuart) Russell
For Ptychodera, extensive EST data from egg, blastulae, gastrulae, larvae, juveniles, adult proboscis, stomochord, and gills defining 34,159 cDNA clones53, and 879,000 Roche/454 RNAseq reads from a mixed library of developmental stages54 were used.
From Nature ● Nov. 17, 2015
Near the end of my visit, our conversation turned from the theoretical consideration of morulas and blastulas to the specific realities of my own condition and treatment.
From Slate ● May 23, 2012
I picture the embryos themselves: round blastulas, with evenly divided cells.
From Slate ● May 23, 2012
