William Harvey (1 apr 1578 anni – 3 giug 1657 anni)

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English physician
He recognized the circulation of blood by arteries and veins in the human body. Before this, it was believed that there were two blood systems in the body.
He concluded that the heartbeat is when the heart decreases its internal volume. Before this, it was believed that the heartbeat was when the heart increased its internal volume.

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