In this episode, we explore the origins of our understanding of blood and its function, going all the way back to ancient Greece and Rome. We'll discuss the humeral system championed by Galen, and how these concepts were finally corrected with the discovery of the circulatory system. The consumption of blood, a practice dating back to ancient times, will be covered, as well as the first transfusions into humans, including the first truly successful one by Dr. James Blundell. As always, there will be lots of twists and turns, so enjoy!