The first surface 930A is exposed to the moisture donating fluid, while the second surface 930B is exposed to {HEAD ~ the moisture} accepting {TAIL ~ fluid} 
accepting
The first surface 930A is exposed to the moisture donating fluid , while the second surface 930B is exposed to { HEAD ~ the moisture } accepting { TAIL ~ fluid }
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 TAIL TAIL TAIL TAIL TAIL