In accordance with this object, means are provided adjacent {HEAD ~ the valve opening} for deflecting serum or {TAIL ~ plasma} passing therethrough 
for deflecting
In accordance with this object , means are provided adjacent { HEAD ~ the valve opening } for deflecting serum or { TAIL ~ plasma } passing therethrough
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH