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