Biology, 24.04.2020 23:20 sylvusia

During implantation, the trophoblast erodes a path through the endometrium. maternal blood vessels in the endometrium are walled off from the blastocyst. inner cell mass begins to form the placenta. entire trophoblast becomes syncytial inner cell mass is temporarily deprived of nutrients

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During implantation, the trophoblast erodes a path through the endometrium. maternal blood vessels i...