16 cell stage Zebrafish embryo
Spindle dynamics, yolk platelet motility, cytoplasmic streaming between the yolk cell and its connected blastomeres.
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Movie#201. Sixteen cell stage Zebrafish embryo.
The first frame shows cells at metaphase. The sequence covers the next four cell cycles.
In each prophase, there is a rapid onset of yolk platelet motility. Yolk material is fragmented off the yolk cell and drawn into the outermost blastomeres through cytoplasmic bridges.
Frames were taken at 30 second intervals.