Page 5, History of Cardiovascular Physiology, Dr. D. Penney

Laplace to Poiseuille:

Early in the 19th century, Pierre Laplace wrote the famous equation describing the relationship between pressure, radius, and wall tension, that now bears his name. He also studied metabolism.

A few years later, Jean Poiseuille made seminal discoveries in the characteristics of blood flow, i.e. rheology, and collected data which was was later developed by Hagenbach and Neumann into the Poiseuille equation.

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