blastula
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Body symmetry is determined at the blastula stage.
From Textbooks ● Jun. 9, 2022
Here the cells in the blastula arrange themselves in two layers: the inner cell mass, and an outer layer called the trophoblast.
From Textbooks ● Jun. 9, 2022
The blastula is often a hollow ball of cells.
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 round cluster becomes filled with fluid, and we have a hollow sphere of cells, which I call the blastula.
From The World's Greatest Books — Volume 15 — Science by Sir John Alexander Hammerton
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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