Although the whole blood sample, including {TAIL ~ 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 the circumference of the buoy 14 is less than the internal circumference of {HEAD ~ the tube} 12 
Although the whole blood sample , including { TAIL ~ 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 the circumference of the buoy 14 is less than the internal circumference of { HEAD ~ the tube } 12
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH