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