Second, by holding liquid water against the water transfer membrane 930 it provides {TAIL ~ a more consistent supply} of water to {HEAD ~ the moisture} accepting fluid channel 920, thereby acting as a water buffer 
Second , by holding liquid water against the water transfer membrane 930 it provides { TAIL ~ a more consistent supply } of water to { HEAD ~ the moisture } accepting fluid channel 920 , thereby acting as a water buffer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH