{HEAD ~ The chamber} 51 also includes a supplemental ramp 111 to urge or push the packed cells towards {TAIL ~ the packed cell removal port} 51c 
{ HEAD ~ The chamber } 51 also includes a supplemental ramp 111 to urge or push the packed cells towards { TAIL ~ the packed cell removal port } 51c
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH