The discs may include perimeters having ovular or elliptical shapes that cooperate with a cylindrical interior wall of {HEAD ~ the housing} to cut {TAIL ~ tissue} specimens 
to cut
The discs may include perimeters having ovular or elliptical shapes that cooperate with a cylindrical interior wall of { HEAD ~ the housing } to cut { TAIL ~ tissue } specimens
OTH OTH OTH OTH 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 OTH