zoom_in Click to enlarge

William Harvey

▲ ▼

description William Harvey Overview

William Harvey was an English physician whose meticulous observations fundamentally reshaped understanding of human physiology. He definitively proved that the heart continuously pumps blood in a circular system throughout the body, challenging long-held Galenic beliefs about stagnant humors. His work, published in *De Motu Cordis* (1628), established the basis for modern circulatory science and remains crucial for medical students and historians of medicine.

help William Harvey FAQ

What did William Harvey prove about blood circulation?

Harvey showed that the heart pumps blood in a continuous circuit through the body. This challenged Galenic medicine, which treated blood as being consumed and replenished rather than circulated.

Which book made William Harvey famous?

Harvey published De Motu Cordis in 1628. Its Latin title is usually translated as On the Motion of the Heart and Blood in Animals.

How did Harvey use measurement in his circulation argument?

Harvey estimated how much blood the heart would move if Galen's model were true. The amount was too large to be constantly produced and consumed, which supported circulation instead.

Did Harvey already know about capillaries?

Harvey inferred that some tiny vessels must connect arteries and veins, but he could not directly see capillaries with the tools available to him. Marcello Malpighi later observed capillaries microscopically in the 1660s.