Realdo Colombo, a former student and colleague of Vesalius, challenged aspects of Galenic anatomy and made significant strides in understanding blood circulation. Through vivisection, Colombo discovered that blood circulates through the lungs, a finding that corrected earlier theories and contributed to a major shift in Renaissance anatomical and physiological studies. His work, though not initially credited, played a crucial role in advancing medical knowledge and laid the groundwork for future discoveries in human physiology. 

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Music Credit: Folk Round Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License