Science & technology

William Harvey describes the circulation of the blood

1628

In 1628 the English physician William Harvey published, in Frankfurt, a short book titled Exercitatio Anatomica de Motu Cordis et Sanguinis. By measuring the volume of blood pumped by the heart, vivisecting animals and tying off veins in the arm, he showed that blood is pumped round the body in a circuit instead of being made in the liver and consumed by the tissues, as Galen had taught. His argument was based on experiment and quantification, a new approach in medicine. The discovery was attacked at first, but the capillaries joining arteries and veins were observed by Marcello Malpighi in 1661.

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This moment belongs to the Early modern world (1500 CE to 1760 CE), voyages, printing and new ideas. You can also browse everything in the 17th century.