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Embryonic Structures > Embryo, Mammalian > Blastocyst

Preferred term

Blastocyst  

Type

  • Topical Descriptor

Broader concept

Narrower concepts

Entry terms

  • Embryo, Preimplantation
  • Embryos, Preimplantation
  • Preimplantation Embryo
  • Preimplantation Embryos

Note

  • Mammalian only; non-mammalian, use BLASTULA; /transpl: coordinate BLASTOCYST (NIM with no qualifiers) + EMBRYO TRANSFER (IM); do not confuse with BLASTOCYTES see BLASTOMERES

Scope note

  • A post-MORULA preimplantation mammalian embryo that develops from a 32-cell stage into a fluid-filled hollow ball of over a hundred cells. A blastocyst has two distinctive tissues. The outer layer of trophoblasts gives rise to extra-embryonic tissues. The inner cell mass gives rise to the embryonic disc and eventual embryo proper.

History note

  • 74

In other languages

URI

http://www.yso.fi/onto/mesh/D001755

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