In one embodiment, {HEAD ~ the device} includes numerous flowpaths that include an active region and {TAIL ~ an inactive region} 
In one embodiment , { HEAD ~ the device } includes numerous flowpaths that include an active region and { TAIL ~ an inactive region }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL