When the heat sink is removed from the computer, {HEAD ~ the heat pipe} is engaged with the heat source to transfer heat generated by {TAIL ~ the heat source} to the heat sink, which is external to the computer 
When the heat sink is removed from the computer , { HEAD ~ the heat pipe } is engaged with the heat source to transfer heat generated by { TAIL ~ the heat source } to the heat sink , which is external to the computer
OTH OTH OTH 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH