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(a–d) Self-organized metachronism in a row of 10 cilia. (e–f) Metachronism in the 100-cilia configuration. Metachronal wave pattern is generated by hydrodynamical coupling. In both configurations the cilia spacing is 0.3, the snapshots are separated in time by 2 ms, the resulting beat frequency is ≈42 Hz, and the units of the axes are nondimensional length.
