An actuator is connected to both the ring and {HEAD ~ the microscope} for moving {TAIL ~ the ring} to adjust the position of the tissue with respect to the optics, thereby allowing an operator of the system to survey different images of tissue sections with the microscope 
for moving
An actuator is connected to both the ring and { HEAD ~ the microscope } for moving { TAIL ~ the ring } to adjust the position of the tissue with respect to the optics , thereby allowing an operator of the system to survey different images of tissue sections with the microscope
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH