Sacrificial Engineer and Goo

On a recent viewing i was watching the Sacrificial Engeer consume the goo. Now this goo looks kinda lumpy but still insrtead of chewing the engineer just sort of gulped some of it down. Of particular interest was the fiorsr biody reactions to thios comsumed goo. Not surprising we are fierst shown the goo evffectsd in his head., the temple past his ears. It should not have surprised me in the later scenes that feature the head(Decapitation, Killing of Weyland and even the exploding head while being electrified.) My point is that the head of alien and humans are a central theme(not even mentioning the Big head Room) firsdt state in the waterfall scene. This same featured body part also shows up in the regeneration of the Hammerpede and Deacon. The thought process of the charactors in the movie is demonstrated by the recurring theme of using your mind located above the shoulders not below the waist.