Galen

Galen was a prominent Roman physician and philosopher in the 2nd century AD, whose ideas significantly influenced medicine for centuries. He conducted dissections on animals, which led to advancements in understanding anatomy and physiology. Galen emphasized the importance of balancing bodily fluids, or "humors," in health. His writings covered various topics, including surgery, pharmacology, and the connection between mind and body. Although many of his theories were later proven incorrect, his work laid the groundwork for both medieval and Renaissance medicine, and his influence is still recognized today in the history of medical science.