Blastula Synonyms

blăschə-lə
Early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs
(Noun)
Synonyms:
  1. blastosphere

Blastula Sentence Examples

  • Then follows the phenomenon of gastrulation, by which onehalf of the blastula is invaginated into the other, so as to obliterate the segmentation cavity.

  • The result of cleavage in all cases is a typical blastula, which when set free becomes oval and develops a flagellum to each cell, but when not set free, it remains spherical in form and has no flagella.

  • When the blastula is oval and freeswimming the inner mass is formed by unipolar immigration from the hinder pole.

  • Thus a planula larva may be a blastula, or but slightly advanced beyond this stage, or it may be (and most usually is) a parenchymula; or in some cases (Scyphomedusae) it may be a gastrula.

  • When the blastula is spherical and not set free, the germ-layer formation is always multipolar, either by immigration or by delamination, i.e.

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