{HEAD ~ The control means} includes {TAIL ~ means} for monitoring the operation of the heart and for actuating the valves to regulate fluid flow to the second chamber in accordance with same 
includes
{ HEAD ~ The control means } includes { TAIL ~ means } for monitoring the operation of the heart and for actuating the valves to regulate fluid flow to the second chamber in accordance with same
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH