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Definitions

blastosphere

[blas-tuh-sfeer] / ˈblæs təˌsfɪər /


Example Sentences

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Plainly, the blastosphere cannot be pre-existing as a structure of particles in the fertilised nucleus; there cannot be blastosphere determinants.

From The Biological Problem of To-day Preformation Or Epigenesis? The Basis of a Theory of Organic Development by Hertwig, Oscar

Such a sphere is called a blastosphere, and may be regarded as a spherical mass of protoplasm, of which the central portion is so much vacuolated that it seems to consist entirely of fluid.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various

We naturally assume, from what we have learnt, that the next stages will be the formation of a hollow blastosphere, invagination, a gastrula forming mesoblast by hollow outgrowths from the archenteron, and so on.

From Text Book of Biology, Part 1: Vertebrata by Wells, H. G. (Herbert George)

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

If we compare this with the typical blastosphere of the lower type, we see that it is, as it were, flattened out on the yolk.

From Text Book of Biology, Part 1: Vertebrata by Wells, H. G. (Herbert George)