Although the whole blood sample, including the red blood cells is loaded above the buoy 14, the red blood cells are able to move between the buoy 14 and the tube wall 42 because {HEAD ~ the circumference} of {TAIL ~ the buoy} 14 is less than the internal circumference of the tube 12 
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Although the whole blood sample , including the red blood cells is loaded above the buoy 14 , the red blood cells are able to move between the buoy 14 and the tube wall 42 because { HEAD ~ the circumference } of { TAIL ~ the buoy } 14 is less than the internal circumference of the tube 12
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 OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH