{HEAD ~ The outer peripheral cell wall} includes {TAIL ~ an outermost peripheral cell wall} forming part of the outer peripheral surface of the block 
includes
{ HEAD ~ The outer peripheral cell wall } includes { TAIL ~ an outermost peripheral cell wall } forming part of the outer peripheral surface of the block
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH