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