d) using {HEAD ~ the endoscope} to bend {TAIL ~ the working end} of the flexible tube to move the second jaw against patient tissue of the esophagus or the stomach; and 
to bend
d ) using { HEAD ~ the endoscope } to bend { TAIL ~ the working end } of the flexible tube to move the second jaw against patient tissue of the esophagus or the stomach ; and
OTH OTH OTH 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 OTH OTH OTH OTH OTH