The syringe includes a plunger which slides within {HEAD ~ an open, cylindrical passage} in {TAIL ~ a cylinder} 
The syringe includes a plunger which slides within { HEAD ~ an open , cylindrical passage } in { TAIL ~ a cylinder }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL