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The blastocyst possesses an inner cell mass from which the embryo will develop, and an outer layer of cells, called the trophoblast, which will eventually form the placenta. The blastocyst is a structure formed in the early embryonic development of mammals. The blastocyst is a structure formed in the early embryonic development of mammals.
The blastocyst differs from the blastula in that it is composed of two already differentiated cell types, the inner cell mass and the enveloping layer. Further differentiation produces a thin … At the time of implantation, the inner cell mass has separated from the trophoblast, gradually increasing and creating a fluid-filled chamber, the amniotic cavity. The morula develops into a blastocyst, a hollow ball of cells that is differentiated into a trophoblast (which will form the future embryonic membranes), an inner cell mass or embryoblast (the …