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