Interestingly, medicine courses at universities don't seem to be as open (liberal in the web, sharing slides, references, etc) as in other subjects. I found out one reason for that is the obligation of secrecy for the patient (cases). Another thing I found out is that book stores in university cities have in average as many books about medicine as about all other topics. These observations come from my gf who started studying medicine in Germany. They surely are not universal.
However, one thing I always tell interested students who wonder what to prepare for/learn for a subject: Go to the website of any favourite university and look up the plan of courses/study regulations for your subject. It's typically public and gives you a good idea what a candidate for a thesis/diploma/degree should have learned. And in fact, in medicine physiology and biochemistry make a good part of the first semesters.