blastosphere
Example Sentences
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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
A limit is set to increase in the size of a blastosphere by the nature of the material of its walls.
From The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development by Oscar Hertwig
Thus, an oval and an elongate egg produce respectively an oval and an elongate blastosphere.
From The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development by Oscar Hertwig
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