FIG 2 shows a schematic view of {HEAD ~ a cross section} of {TAIL ~ the intermediate layer} in FIG 1 sectioned parallel to the plane 
of
FIG 2 shows a schematic view of { HEAD ~ a cross section } of { TAIL ~ the intermediate layer } in FIG 1 sectioned parallel to the plane
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH