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. 2011 Oct 18;6(10):e26306. doi: 10.1371/journal.pone.0026306

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Fu et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Sequence of differential frames showing individual cells flowing along blood vessels in a live Daphnia. These images were acquired in full frame mode at 24.6 fps. Frame 1 (A), 8 (B), 15(C), 22(D), 29(E) and 36(F). These differential images are obtained by subtracting adjacent frames. A second blood cell can be seen entering into the field of view in frame 22 (D) (see supplementary material Movie S4).