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