Final answer:
William Harvey discovered the circulation of blood and its movement through the body, as pumped by the heart, which was a significant advancement in the field of medicine and biology.
Step-by-step explanation:
William Harvey, an English physician, made a groundbreaking discovery in the field of medicine. He was the first to describe in detail the systemic circulation of blood and the role of the heart in pumping it to the brain and body. His work, outlined in his treatise Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus, disproved centuries-old theories about how blood moved through the body. Unlike the answers suggesting electricity or a new continent, which are related to different fields of study, Harvey's work was firmly rooted in medicine and biology. This discovery was instrumental in advancing our understanding of human physiology and the function of the cardiovascular system.