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of the material causes the slits to close and the fluid tight seal to be maintained when {HEAD ~ the catheter} is withdrawn from {TAIL ~ the valve body} 
is withdrawn from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of the material causes the slits to close and the fluid tight seal to be maintained when { HEAD ~ the catheter } is withdrawn from { TAIL ~ the valve body }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