{HEAD ~ The rearward section} includes an interior chamber and {TAIL ~ an opening} or channel that extends from the chamber to provide a water flow path between the chamber and the surrounding body of water 
includes
{ HEAD ~ The rearward section } includes an interior chamber and { TAIL ~ an opening } or channel that extends from the chamber to provide a water flow path between the chamber and the surrounding body of water
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH