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blastula
[blas-chuh-luh]
noun
plural
blastulas, blastulaethe early developmental stage of an animal, following the morula stage and consisting of a single, spherical layer of cells enclosing a hollow, central cavity.
blastula
/ ˈæʊə /
noun
Also called: blastosphere.an early form of an animal embryo that develops from a morula, consisting of a sphere of cells with a central cavity
blastula
plural
blastulasAn animal embryo at the stage immediately following the division of the fertilized egg cell, consisting of a ball-shaped layer of cells around a fluid-filled cavity known as a blastocoel.
Compare gastrula See also blastocyst
blastula
The stage of an embryo that consists of just over a hundred cells — a stage reached about one week after fertilization. At this stage the cells are just at the very beginning of cellular differentiation and are said to be totipotent (See totipotency).
Other Word Forms
- blastular adjective
- blastulation noun
- ˈٳܱ adjective
Word History and Origins
Word History and Origins
Origin of blastula1
Example Sentences
On the first screen I thought I saw a chick or a frog taking shape, though the creature would palpitate into an egg, a lumpen lime or a blastula of germinating cells.
But before you can say blastula, his wife — he begins by calling her Clo, then just goes with her real name, Jen — is crying all the time and sending all-caps texts about pretzels.
Ryden has peopled Ratmansky’s stage with furry animals that look like fairground prizes, a gum-ball lady resembling a blastula, and various creatures that slither on the floor and wag their ears.
Just after this—at the mid-late blastula stage—the cells synthesize large RNA molecules, which are believed not to include ribosomal RNA but which are likely to include "messenger" RNA.
In removing a blastula, you are indeed destroying something, but what exactly — a potential life?
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