Elias von Cyon

Son of Pinkhos (Faddey) Cyon and his wife Sarah; he had an elder brother Moses (born 1840).

[2] Cyon studied medicine at the medical-surgical academy in Warsaw, at the University of Kiev and in Berlin.

In 1866, he worked in Leipzig as an assistant to Carl Ludwig (1816–1895), with whom he collaborated on creation of the first isolated perfused frog heart preparation.

In 1870, he became an associate professor, and following student protests concerning his political views, he relocated to Paris in 1877.

In Paris, he attained French citizenship and worked with famed physiologist Claude Bernard (1813–1881).