Blood Vascular System
Diagram of the blood vascular system, showing that it forms a single closed circuit with two pumps in it, consisting of the right and left halves of the heart, which are represented separate in the diagram. Labels: ra and rv, right auricle and ventricle; la and lv, left auricle and ventricle; ao, aorta; sc, systemic capillaries; vc, venae cavae; pa, pulmonary artery; pc, pulmonary capillaries; pv, pulmonary veins.
Martin, H. Newell & Martin, Ernest G. The Human Body: An Account of Its Structure and Activities and the Conditions of its Healthy Working (New York: Henry Holt and Company, 1917) 336
Courtesy the private collection of Roy Winkelman