William Harvey — "The heart is the beginning of life, and the source of all motion."
The heart is the beginning of life, and the source of all motion.
The heart is the beginning of life, and the source of all motion.
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"The best way to learn is to teach."
"The examination of the body after death is a most useful and necessary practice."
"Nature is a free and open book, to be read and understood by all who have the patience and the power to do so."
"Nature is the best teacher."
"It is by experiment alone that we can arrive at the knowledge of nature."
English physician whose On the Motion of the Heart and Blood in Animals (1628) demonstrated blood circulation, overturning 1,400 years of Galenic medicine. Closely associated with Francis Bacon (his contemporary in the new English empiricism). For an intellectual contrast, see Galenic medicine, the 2nd-century Greek medical tradition (humors, blood-as-consumed-fuel) — Harvey calculated that the heart pumps more blood per hour than the body could possibly produce as fuel — a single quantitative observation that demolished the entire Galenic-Aristotelian medical worldview. The cleanest example in medical history of arithmetic disproving 14 centuries of authority.
A statement on the heart's fundamental role in physiology.
Date: 1628 (from 'De Motu Cordis')
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The heart is the central engine of the body — not merely a pump, but the origin point of all biological activity and movement. Without its rhythmic contractions, nothing else in the body functions. Life itself begins and ends with the heart's motion, making it the fundamental source of every physiological process that sustains a living creature.
Harvey spent decades dissecting animals and observing beating hearts to prove blood circulates continuously rather than being consumed. His 1628 masterwork 'De Motu Cordis' placed the heart at the center of his revolutionary circulatory model, overturning Galen's 1,400-year-old static blood theory. This quote is the philosophical core of his life's scientific mission.
In the early 1600s, Galenic medicine still dominated European universities, teaching that the liver produced blood which organs simply absorbed. Harvey's assertion elevated the heart from a passive organ to the body's sovereign engine during a period of intense anatomical investigation sparked by Vesalius, making his claim both scientifically radical and professionally dangerous.
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