born in Belgium 1514 he became a professor aged 22
respected Galen's work yet was one of the first to challenge his ideas
was one of the first to dissect a human body
1543 published 'fabric of the human body' which proved:
breast bone is 3 parts not 7
jaw bone is one part not 2
disapproved that blood travelled through invisible holes in the septum and into the heart
his book also showed the body in more detail than ever due to the new invention of the printing press in 1451. it was available across Europe to train doctors. it encouraged dissection