blastula
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The blastula, which in some species is a hollow ball of cells, undergoes a process called gastrulation, in which the three germ layers form.
From Textbooks ● Jun. 9, 2022
Gastrulation is the process in which the cells in the blastula rearrange themselves and form three layers of cells.
From Textbooks ● Jun. 9, 2022
Body symmetry is determined at the blastula stage.
From Textbooks ● Jun. 9, 2022
Further cleavage results in a hollow ball of cells called a blastula.
From Textbooks ● Jan. 1, 2015
The actual ontogenetic development of the gastrula from the blastula furnishes sound evidence as to the phylogenetic origin of the Gastraea from the Blastaea.
From The Evolution of Man — Volume 2 by Ernst Heinrich Philipp August Haeckel
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
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