The discs may include inwardly directed notches formed in their outer perimeter, with {HEAD ~ the notches} cooperating with {TAIL ~ an interior wall} of the housing to cut tissue specimens 
cooperating with
The discs may include inwardly directed notches formed in their outer perimeter , with { HEAD ~ the notches } cooperating with { TAIL ~ an interior wall } of the housing to cut tissue specimens
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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