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Inner cell mass (embryoblast)

Very high power SEM of the inner cell mass (embryoblast) of a stage 3 embryo in vitro (original magnification x12,000).

Notice the homogeneity of cell size in this expanded blastocyst.

From: Ménézo et al., 1999. Reproduced with permission of the publisher, Cambridge University Press.

Keywords: blastocyst(s), inner cell mass (embryoblast)

Source: The Virtual Human Embryo.