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