At the same time, {TAIL ~ the balls} function to cool {HEAD ~ the underlying body portion}, thereby serving a dual function 
At the same time , { TAIL ~ the balls } function to cool { HEAD ~ the underlying body portion } , thereby serving a dual function
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH