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