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Single blastomere from a 7-cell embryo

SEM of a single blastomere from a stage 2, 7-cell embryo in vitro on post-insemination day 3 . Microvilli are sparce and no polarization is evident. Zona pellucida was removed mechanically.

From: Nikas et al., 1996. Reproduced with permission of the publisher, John Wiley & Sons.

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Keywords: blastomere, microvilli, stage 2 embryo, zona pellucida

Source: The Virtual Human Embryo.