Claude Bernard was a French physiologist, who is considered the “father” of modern experimental physiology and life sciences and one of the most important physiologists of all time.

He was born on July, 12th 1813 in a farm in Saint-Julien, department of Rhône. Claude Bernard's works were carried out on the physiology of digestion, the gastric juices and of the intestines. The study of internal metabolism was also one of his main fields of interest. In addition to this, Bernard also made other important contributions to the neurosciences. He played a role in establishing the principles of experimentation in the life sciences to become one of the founders of experimental medicine.

He wrote, "The stability of the internal environment [the milieu intérieur] is the condition for the free and independent life." - base for modern cell engineering technologies.

In the 1868, he was admitted a member of the Académie française and elected a foreign member of the Russian and Royal Swedish Academies of Sciences.