a tubular body which defines said passage, {HEAD ~ the tubular body} having {TAIL ~ an opening} on the distal end therethrough 
having
a tubular body which defines said passage , { HEAD ~ the tubular body } having { TAIL ~ an opening } on the distal end therethrough
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH