ocr: D H B PLAN OF THE CIRCULATION. A. Capillaries on the general surface. B. Vena cava. C. Right auricle. D. - Right ventricle. E. Pulmonary artery. F. Capillaries of thelungs uniting to form the pulmonary veins, which enter G. The left auricle. H. The left ventricle. I. Theaorta posterior, dividing into small- er arteries, and united with the capil- laries at A. J. The trunk of the aorta anterior.
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