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Blastocyste

Blastocyste (blastocystis – LNE (The Leningrad embryological nomenclature); Greek blastos – a sprout, a germ + Greek kystis – a bubble; synonyms: a germinal bubble, a blastodermichesky bubble) – the germ of mammals having the bladder-like form (including the person) during crushing.

Types of a blastocyste:

  • Two-layer [(blastocystis bilaminaris – LNE (The Leningrad embryological nomenclature)] – a blastocyste which wall consists of two layers: from a layer of cells of the trophoblast and a layer of cells of an extraembryonic endoderm spreading it from within;
  • Three-layered [(blastocystis trilaminaris – LNE (The Leningrad embryological nomenclature)] – a blastocyste in which wall between layers of cells of an extraembryonic entoderm and a trophoblast the layer of cells of an extraembryonic mesoderm with vessels is located.
 
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