Typically for a single transistor only one surface of each drain and source region make direct contact to the semiconductor body and these surfaces are on {HEAD ~ opposite sides} of {TAIL ~ a channel region} of each transistor 
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Typically for a single transistor only one surface of each drain and source region make direct contact to the semiconductor body and these surfaces are on { HEAD ~ opposite sides } of { TAIL ~ a channel region } of each transistor
OTH OTH OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH