blastosphere
Example Sentences
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The segmentation is complete; one side of the hollow blastosphere invaginates and forms a gastrula.
From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" by Various
There is no open invagination of an archenteron in the fowl, as in the frog--, the gastrula, like the blastosphere, stage is also masked.
From Text Book of Biology, Part 1: Vertebrata by H. G. (Herbert George) Wells
The blastosphere determines the orientation of the gastrula, and so forth.
From The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development by Oscar Hertwig
The central part of the blastosphere is called the segmentation cavity or blastocoel.
From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various
The conditions for the origin of the blastosphere come into existence only by the process of segmentation, and it is only by its capacity to divide that the egg contains the conditions for blastosphere formation.
From The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development by Oscar Hertwig