Le sang, est-il identique dans tous les vaisseaux qu’il parcourt?

Like de Bordeu, and more definitely, Legallois anticipated the conception of internal secretions. He surmised from the identity in composition of all varieties of arterial blood and the diversity of venous blood in different parts of the body, that this diversity is acquired, in each case from the loss of some substance from the organ from which the vein proceeds.