The word autopsy comes from the Greek “to see for oneself”; as Vesalius learned to see for himself, he could no longer force Galen’s mystical visions to fit his own. The lymphatic system carried a pale, watery fluid; the blood vessels were filled, as expected, with blood. Yellow bile was in the liver. But black bile—Galen’s oozing carrier of cancer and depression—could not be found anywhere. Vesalius now found himself in a strange position. He had emerged from a tradition steeped in Galenic scholarship; he had studied, edited, and republished Galen’s books. But black bile—that glistening
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