Blastula



the early developmental stage of an animal, following the morula stage and consisting of a single, spherical layer of cells enclosing a hollow, central cavity.
Historical Examples

The Riddle of the Universe at the close of the nineteenth century Ernst Haeckel
The World’s Greatest Books – Volume 15 – Science Various
The Science and Philosophy of the Organism Hans Driesch
A Guide to the Study of Fishes, Volume 1 (of 2) David Starr Jordan
The Biological Problem of To-day Oscar Hertwig
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 Various
The Ethics of Medical Homicide and Mutilation Austin O’Malley
Life of Elie Metchnikoff, 1845-1916 Olga Metchnikoff
Life of Elie Metchnikoff, 1845-1916 Olga Metchnikoff
Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 2 Various

noun (pl) -las, -lae (-liː)
an early form of an animal embryo that develops from a morula, consisting of a sphere of cells with a central cavity Also called blastosphere
n.
blas’tu·lar adj.
blas’tu·la’tion (-lā’shən) n.
blastula
(blās’chə-lə)
Plural blastulas or blastulae (blās’chə-lē’)
An 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 [(blas-chuh-luh)]

Note: This is the stage of development where embryonic stems cells can be harvested for medical research.

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    the early developmental stage of an animal, following the morula stage and consisting of a single, spherical layer of cells enclosing a hollow, central cavity. noun (embryol) the process of blastula formation noun (pl) -las, -lae (-liː) an early form of an animal embryo that develops from a morula, consisting of a sphere of cells […]

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