The one or more passages may have a serpentine path back and forth along cells of the second plurality, and {HEAD ~ the passage} may connect laterally from {TAIL ~ cell} to cell, within cells of the second plurality, at or near the ends of the body 
The one or more passages may have a serpentine path back and forth along cells of the second plurality , and { HEAD ~ the passage } may connect laterally from { TAIL ~ cell } to cell , within cells of the second plurality , at or near the ends of the body
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 OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH