▁create . ▁V es al ius ' ▁reply ▁to ▁Fal lop io ▁was ▁published ▁in ▁May ▁ 1 5 6 4 , ▁a ▁month ▁after ▁V es al ius ' ▁death ▁on ▁the ▁Greek ▁island ▁of ▁Z ante ▁( now ▁called ▁Zak yn th os ). ▁ ▁Scient ific ▁find ings ▁ ▁S ke let al ▁system ▁▁▁ ▁V es al ius ▁believed ▁the ▁ske let al ▁system ▁to ▁be ▁the ▁framework ▁of ▁the ▁human ▁body . ▁ ▁It ▁was ▁in ▁this ▁opening ▁chapter ▁or ▁book ▁of ▁De ▁fab rica ▁that ▁V es al ius ▁made ▁several ▁of ▁his ▁strong est ▁claims ▁against ▁Gal en ' s ▁theories ▁and ▁writ ings ▁which ▁he ▁had ▁put ▁in ▁his ▁an atom y ▁books . ▁In ▁his ▁extensive ▁study ▁of ▁the ▁sk ull , ▁V es al ius ▁claimed ▁that ▁the ▁mand ible ▁consisted ▁of ▁one ▁b one , ▁whereas ▁Gal en ▁had ▁thought ▁it ▁to ▁be ▁two ▁separate ▁b ones . ▁He ▁accur ately ▁described ▁the ▁vest ib ule ▁in ▁the ▁interior ▁of ▁the ▁temporal ▁b one ▁of ▁the ▁sk ull . ▁ ▁In ▁Gal en ' s ▁observation ▁of ▁the ▁a pe , ▁he ▁had ▁discovered ▁that ▁their ▁stern um ▁consisted ▁of ▁seven ▁parts ▁which ▁he ▁assumed ▁also ▁held ▁true ▁for ▁humans . ▁ ▁V es al ius ▁discovered ▁that ▁the ▁human ▁stern um ▁consisted ▁of ▁only ▁three ▁parts . ▁ ▁He ▁also ▁dis pro ved ▁the ▁common ▁belief ▁that ▁men ▁had ▁one ▁rib ▁fewer ▁than ▁women ▁and ▁noted ▁that ▁the ▁fib ula ▁and