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