CIRCULATION

is the pa age of the blood from the heart to all parts of the body and back to the heart. The blood is now known to pa from the left side of the heart to all parts of the body except tho lungs, and thence to the right side of the heart, which sends it back to the left side of the heart by pa ing it through the where it is purified. Tho Ag a of the blood from t heart to left heart through the lungs was discovered Servetus in 1553, but the om of the circuit was a oe as recently as se, Harvey. The of this discovery was to prevent any patient eee ten yoors, absurd were hit views emer The actual pa age of the throu capillaries was first seen by Malpighi in 1661 with the aid of alens. Up till Harvey's time the chief art cries were any to carry — air and not blood. [See Blood-ve els; Heart. [s. 343]