When the breakable membrane is broken, {TAIL ~ fluid} can pass between {HEAD ~ the first and second chambers} 
When the breakable membrane is broken , { TAIL ~ fluid } can pass between { HEAD ~ the first and second chambers }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD