Besides, from thence we know also that the true use of respiration is to bring fresh air enough to the lungs, to cause that bloud which comes from the right concavity of the heart, where it was rarified, and (as it were) chang'd into vapours, there to thicken, and convert it self into bloud again, before it fall again into the left, without which it would not be fit to serve for the nourishment of the fire which is there.
Gainera, hemendik ezagutzen da arnasaren benetako eginbeharra biriketara aire freskoa sartzea dela, horrela bihotzeko eskubiko zulogunetik bakandua eta lurrundua legez datorkion odola sendotuko delarik, eta atzera odol bihurtuko delarik ezkerreko zulogunera itzuli aurretik, ez bailitzateke bestela erregai egokia izango bertan dagoen suarentzat.