1. 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
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How To Use blastula In A Sentence

  • Note the blastula in reptiles is called a blastoderm or blastodisk because the divisions have been concentrated into a thin disk of cells at the animal pole.
  • the invagination of the blastula
  • At blastula stage 8, cells forming the blastocoelic roof were cultured in isolation as explants.
  • Apparently, one of the master Scientists was trying to cark Scutari blastulas into a shape more to his liking. THE BROKEN GOD
  • The whole performance does indeed remind me of the foldings and invaginations that the membranes of an embryo undergo as it morphs itself from blastula to gastrula to neurula. The God Delusion
  • The globular wall of the blastula is a real blastoderm, and consists of homogeneous (blastodermic) cells; it is not yet differentiated into the two primary germinal layers. The Evolution of Man — Volume 1
  • Thus a portion of the upper marginal zone of the blastula or early gastrula, or else a piece of the roof of the archenteron of the mature gastrula was planted in the blastocoele of a young gastrula and so brought beneath the ectoderm from the beginning; it was demonstrated that these portions were able to induce neural plate. Hans Spemann - Nobel Lecture
  • That is to say, those parts of the embryo which are being examined for their inductive capacity can be made to bypass the activte invagination and can be made effective by inserting them in the blastocoele through a small slit in the roof of the blastula or young gastrula which quickly heals over. Hans Spemann - Nobel Lecture
  • By the formation of an inner cavity or blastocoele, the blastocyst or blastula comes into being. Hans Spemann - Nobel Lecture
  • Inside this spherical mass of cells, a fluid-filled cavity - the blastocoel - develops in the animal region and the embryo is now called a blastula.
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