Figure 2. (A) Magnetization direction; (i) Cilia magnetized in the upper direction, (ii) Cilia magnetized in the opposite direction, (B) Motion of a cilium manipulated by each field; (i) Strike magnetic field and (ii) Rotating magnetic field, (C) 8-coil electromagnetic system used actuation and CCD camera used for observation, and (D) Schematic of the acrylic channel and tank used in the experiment