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But to direct a droplet to flow in a more complex pattern, the researchers had to divide their chip’s surface into “ciliary units” of a few dozen cilia each—with each unit individually controllable.

One indefatigable individual subjected to 13 bead blasts responded persistently with ciliary alternation or contraction, never bending or detachment.

When we focus on a close object like a screen, tiny muscles inside the eyes - the ciliary muscles - contract.

“For regular smoking, we know it inhibits the ciliary clearance of the airways,” Pirzada explained to Scientific American.

“For regular smoking, we know it inhibits the ciliary clearance of the airways,” Pirzada says.