the apex of the chin runs exactly across the apple when the head is lowered, shielding it from a head on strike.
I've always wondered why we have an exposed neck at all, surely its an evolutionary disadvantage? Why dont we have a flexible bone in front of the neck? Then I found out this wierd fact - the apple is part of the cartilage rows that were once gill structure in our fishy ancestors. The gap we have between that adams apple/larynx cartilage and jawbone was one of the gill slits. friggin wierd!
And embroys grow exposed gills in the womb!


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