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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.

Blood Vascular System

Diagram of the blood vascular system, showing that it forms a single closed circuit with two pumps in…