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

Question

Quizplus · Accepted Answer

The syncytiotrophoblast layer of the blastocyst is responsible for secreting enzymes that allow the embryo to penetrate the uterine lining during the process of implantation. This layer forms part of the trophoblast, which develops into the placenta.

Which Layer of the Blastocyst Secretes Enzymes That Are Used