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(a) Schematic illustration of a pneumatically tunable microfilter and a close-up view of the filter zone. [Reprinted with permission from S. B. Huang et al., Sens. Actuators B 142, 389 (2009). © 2009, Elsevier.] (b) Differential manipulation of regions of a single bovine capillary endothelial cell using multiple laminar flows. [Reprinted with permission from S. Takayama et al., Nature (London) 411, 1016 (2001). © 2001, Macmillan.]
