{TAIL ~ The resilient nature} of the material causes the slits to close and the fluid tight seal to be maintained when the catheter is withdrawn from {HEAD ~ the valve body} 
{ TAIL ~ The resilient nature } of the material causes the slits to close and the fluid tight seal to be maintained when the catheter is withdrawn from { HEAD ~ the valve body }
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD