{TAIL ~ The plane} of {HEAD ~ at least some} of these cells are substantially parallel to the impacting force 
{ TAIL ~ The plane } of { HEAD ~ at least some } of these cells are substantially parallel to the impacting force
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH