During the centrifuge process the red bloods cells of the red blood cell fraction 222 force the buoy 14 in the direction of the top 12 a of the tube 12 because {HEAD ~ the buoy} 14 is less dense than {TAIL ~ the red blood cell fraction} 222 
During the centrifuge process the red bloods cells of the red blood cell fraction 222 force the buoy 14 in the direction of the top 12 a of the tube 12 because { HEAD ~ the buoy } 14 is less dense than { TAIL ~ the red blood cell fraction } 222
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH