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Description: As the blastocyst formed, two different cell populations arose: The embryoblast (inner cell mass) will develop into the embryo. The trophoblast (outer cell mass) will develop into the outer chorionic sac surrounding the fetus, and the fetal portion of the placenta. Picture Stats: Views: 190 Filesize: 466.41kB Height: 372 Width: 1350 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=40483 |