{HEAD ~ at least first and second openings} configured to allow fluids to flow into {TAIL ~ the first opening} and out of the second opening 
{ HEAD ~ at least first and second openings } configured to allow fluids to flow into { TAIL ~ the first opening } and out of the second opening
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH