SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Bloodletting sites. Latin text illustrating the veins and zodiac sites where blood was extracted using cuts or leeches. Bloodletting, or phlebotomy, was thought to cure illnesses believed to be caused by imbalances in bodily fluids. The diagram, known as a vein man, is from Johannes de Ketham's Fasciculus Medicinae (Venice, 1491).
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