{HEAD ~ The anatomical apparatus} includes {TAIL ~ a support} defining a cavity having a lower tier of a selected width and an open upper wider tier communicating with the lower tier 
{ HEAD ~ The anatomical apparatus } includes { TAIL ~ a support } defining a cavity having a lower tier of a selected width and an open upper wider tier communicating with the lower tier
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH