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Cell junction of a 4-cell embryo

Very high power TEM of the cell junction of a stage 2, 4-cell embryo in vitro 44 hours post-insemination (original magnification x69,610) . Desmosome-like junctions are present and the increased electron density within the cell membrane converge toward each other in the intercellular space.

Mt = microtubule
S = smooth endoplasmic reticulum

From: Sathananthan, 1984. Reproduced with permission of the publisher, Elsevier.

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Keywords: cell junction, desmosome-like junctions, four-cell embryo, intercellular space, stage 2 embryo

Source: The Virtual Human Embryo.