Comprehensive Invasive and Noninvasive Approach to the Right Ventricle–Pulmonary Circulation Unit

And I ask, as the lungs are so close at hand, and in continual motion, and the vessel that supplies them is of such dimensions, what is the use or meaning of this pulse of the right ventricle?And why was nature reduced to the necessity of adding another ventricle for the sole purpose of nourishing the lungs?-William Harvey, Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus, 1628