es al ius ▁for ▁calling ▁attention ▁to ▁the ▁difference . ▁ ▁Gal en ▁had ▁assumed ▁that ▁ar ter ies ▁carried ▁the ▁pur est ▁blood ▁to ▁higher ▁org ans ▁such ▁as ▁the ▁brain ▁and ▁l ungs ▁from ▁the ▁left ▁vent ric le ▁of ▁the ▁heart , ▁while ▁ve ins ▁carried ▁blood ▁to ▁the ▁less er ▁org ans ▁such ▁as ▁the ▁st om ach ▁from ▁the ▁right ▁vent ric le . ▁In ▁order ▁for ▁this ▁theory ▁to ▁be ▁correct , ▁some ▁kind ▁of ▁opening ▁was ▁needed ▁to ▁inter connect ▁the ▁vent ric les , ▁and ▁Gal en ▁claimed ▁to ▁have ▁found ▁them . ▁So ▁param ount ▁was ▁Gal en ' s ▁authority ▁that ▁for ▁ 1 4 0 0 ▁years ▁a ▁succession ▁of ▁an atom ists ▁had ▁claimed ▁to ▁find ▁these ▁holes , ▁until ▁V es al ius ▁admitted ▁he ▁could ▁not ▁find ▁them . ▁Non eth eless , ▁he ▁did ▁not ▁vent ure ▁to ▁dispute ▁Gal en ▁on ▁the ▁distribution ▁of ▁blood , ▁being ▁unable ▁to ▁offer ▁any ▁other ▁solution , ▁and ▁so ▁supposed ▁that ▁it ▁diff used ▁through ▁the ▁un bro ken ▁partition ▁between ▁the ▁vent ric les . ▁ ▁Other ▁famous ▁examples ▁of ▁V es al ius ▁dis pro ving ▁Gal en ' s ▁assert ions ▁were ▁his ▁discover ies ▁that ▁the ▁lower ▁j aw ▁( m and ible ) ▁was ▁composed ▁of ▁only ▁one ▁b one , ▁not ▁two ▁( which ▁Gal en ▁had ▁assumed ▁based ▁on ▁animal ▁dis section ) ▁and ▁that ▁humans ▁lack ▁the ▁re te ▁m ira b