The technology developed quickly and Doctors/scientist were able to print ideas so more people world wide use the idea and develop, for example Vesalius published a booking 1543 about all what he learned, the Fabric of the human Body.
In addition, the church became less powerful, people were able to read the bible themselves and they were more inclined to question the church teaching. They opened a new protestant church in northern Europe to replace the Catholic Church, so it became easier for people to do dissection and this allowed Andreas Vesalius (professor of anatomy)to realise that something was wrong with Galen’s theories. For example, Galen had said the human jaw had two jaws but Vesalius confirmed there was just one. Harvey Williams did also find some wrongs in Galen’s work; He calculated that it was impossible for the blood to be burn up in the muscles (as Galen had claimed). He published a book called 'Anatomical Account of the Motion of the Heart and Blood', which scientifically proved the principle of the circulation of the blood. This book marked the start of the end of Galen theories.
Despite progress in some areas of medicine, Early Modern doctors did not advance understanding of the causes of disease. The doctors still did not manage to use their discoveries to develop better cures for their patients, because they had still not discovered the role that germs play in causing disease. The 'cures' tried by Charles II's doctors after he had had a mild stroke - which he might have recovered from quickly today - certainly made him more ill. The treatments were still based on the four humours and the theories of opposites.
In conclusion the knowledge of the anatomy progressed but there were still...