This multinucleate embryonic structure invades the uterus, digesting cells and maternal blood vessels to make way for development of the placenta.
A) syncytiotrophoblast
B) morula
C) inner cell mass
D) decidua basalis
E) decidua capsularis

Question

Quizplus · Accepted Answer

The syncytiotrophoblast is a layer of multinucleate cells that digests maternal cells and blood vessels to make room for the implantation of the embryo and the development of the placenta. The morula is a solid ball of cells that forms early on in embryonic development, before implantation. The inner cell mass is the group of cells within the blastocyst that will give rise to the embryo proper. The decidua basalis and decidua capsularis are both layers of the endometrium (uterine lining) that are present during pregnancy, but they do not invade the uterus like the syncytiotrophoblast does.

This Multinucleate Embryonic Structure Invades the Uterus, Digesting Cells and Maternal