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