{TAIL ~ One screen} may cooperate with {HEAD ~ another screen} to provide shearing of the tissue specimens 
{ TAIL ~ One screen } may cooperate with { HEAD ~ another screen } to provide shearing of the tissue specimens
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH