Par ma foi! il y a plus de quarante ans que je dis de la prose sans que j’en susse rien… Monsieur Jourdain, Moliere, Le Bourgeois Gentilhomme , Act II, Scene IV Physiological reasoning has always been essential to the practice of respiratory medicine. Yet the teaching of physiology has been on the decline in many universities. Meanwhile, advances in molecular biology, genetics and systems biology have deeply modified biomedical research with renewed demands for bedside translation. Not uncommonly now, the question is raised about the very meaning of the word “physiology”. Is it nothing more than a constant …