A fuel cell system 14, wherein {HEAD ~ the first electrode} of each fuel cell is in contact with reactant permeable region of {TAIL ~ the associated substrate} 
A fuel cell system 14 , wherein { HEAD ~ the first electrode } of each fuel cell is in contact with reactant permeable region of { TAIL ~ the associated substrate }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL