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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    brazenly obvious; flagrant: a blatant error in simple addition; a blatant lie. offensively noisy or loud; clamorous: blatant radios. tastelessly conspicuous: the blatant colors of the dress. Historical Examples The Best Short Stories of 1921 and the Yearbook of the American Short Story Various Desert Dust Edwin L. Sabin Cathedrals and Cloisters of the South […]


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