Which Layer of the Blastocyst Secretes Enzymes That Are Used

question 56

Multiple Choice

Which layer of the blastocyst secretes enzymes that are used by the embryo to penetrate the uterine lining during implantation?

• A)syncytiotrophoblast layer
• B)cytotrophoblast layer
• C)endoderm layer
• D)mesoderm layer
• E)ectoderm layer

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