Coloured SEM of the junction between embryo cells

Coloured SEM of the junction between embryo cells

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This image is part of the feature First Week Of Life


Caption: Embryo cell junction. Coloured scanning electron micrograph (SEM) of the junction between two blastomere cells in an 8-cell embryo, 3 days old. At lower and upper frame are two blastomere cells. The surface of each cell is covered in microvilli (red), tiny projections. Microvilli increase the cell surface area, and here also function as bridges communicating between the cells. At the 8- cell stage, these embryo cells are loosely joined allowing the cells to be separated for in vitro studies. On day 4 blastomere cells fuse together tightly (compaction) and are no longer easy to separate. Magnification: x4200 at 5x7cm size. x15,000 at 8x10".

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Keywords: 3 days, 8-cell, blastomere, bridges, cell juction, cell junction, cytoplasmic bridge, embryo, embryo blastome, human body, intrablastomere surface, microvilli

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