Léon Fredericq

Léon Fredericq (24 August 1851 – 2 September 1935) was a Belgian physiologist. He conducted pioneering experiments on blood physiology, and discovered the copper-based hemocyanin of octopuses. He also examined gas-exchange, the working of the heart, and the transport of carbon dioxide and oxygen by blood. He served as a professor at the University of Liège from 1879. Provided by Wikipedia