Q:

Between which two layers is the extraem- bryonic mesoderm located?

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Between which two layers is the extraem-bryonic mesoderm located?


  1. Epiblast and hypoblast
  2. Syncytiotrophoblast and cytotrophoblast
  3. Syncytiotrophoblast and endometrium
  4. Exocoelomic membrane and syncytiotrophoblast
  5. Exocoelomic membrane and cytotrophoblast

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E. The extraembryonic mesoderm is derived from the epiblast and is located between the exocoelomic membrane and the cytotrophoblast. The overall effect is to completely sepa-rate the embryoblast from the trophoblast, with the extraembryonic mesoderm serving as a conduit (connection) between them.

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