The device includes {TAIL ~ a fluid channel} having a surface and {HEAD ~ an object} such as a bacterium or virus may flow through the fluid channel 
The device includes { TAIL ~ a fluid channel } having a surface and { HEAD ~ an object } such as a bacterium or virus may flow through the fluid channel
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH