A second member is disposed within the first member to transmit force to move {HEAD ~ a cutting implement} disposed at {TAIL ~ its distal end} and cause it to cut tissue that is exposed to the implement through the opening 
disposed at
A second member is disposed within the first member to transmit force to move { HEAD ~ a cutting implement } disposed at { TAIL ~ its distal end } and cause it to cut tissue that is exposed to the implement through the opening
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH