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(a) Flow is turned on at t = 0. As time progresses to t ∼ 4.6 s, the cilium bends until it reaches a maximum. (b) The flow is turned off and the cilium relaxes from t = 5 s until reaching a stress-free configuration at t = tf ∼ 9.6 s. The cilium length is 2.7 ± 0.5 μm and t = 0.
