The water transport unit includes a moisture donating fluid channel and a moisture accepting fluid channel, where the latter is fluidly connected with a portion of {HEAD ~ the fuel cell} that is in {TAIL ~ need} of humidification 
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The water transport unit includes a moisture donating fluid channel and a moisture accepting fluid channel , where the latter is fluidly connected with a portion of { HEAD ~ the fuel cell } that is in { TAIL ~ need } of humidification
OTH OTH OTH OTH OTH OTH OTH 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 HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH