A channel is provided whereby the metallic ions can flow into {TAIL ~ the body} of {HEAD ~ water} 
A channel is provided whereby the metallic ions can flow into { TAIL ~ the body } of { HEAD ~ water }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD