{HEAD ~ The platelet rich plasma} flows into the second part and is separated into {TAIL ~ platelet poor plasma} and platelets 
is separated into
{ HEAD ~ The platelet rich plasma } flows into the second part and is separated into { TAIL ~ platelet poor plasma } and platelets
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH