Why was Anatomy so important and used so dramatically during the Renaissiance? That is the question...There are a few answers but the one that I like to focus on is based on this train of thought.
Present day, if our body causes us aches and pains, or if we break a bone or injure ourselves internally we are able visit any hospital and they are most likely able diagonse what is wrong with us and fix us up. For those things unforeseeable by the naked eye they have all types of machines that can look inside, outside and everywhere in between us. The same could not be said in the Renaissance.
In the early 15th century the same injuries may have and probably did go undiagnosed. So how did they figure out how the body what went where. How did they know what they would need to look for and where to find it in the body? Was it mostly guess work at the time and if it was then something must have changed...