. Elementary biology; an introduction to the science of life . Fig. 70. The " double circulation " of the blood The arrows indicate the direction of blood flow. The shaded portion represents blood lacking in oxygen. From the right heart (shaded) the blood passes to the lungs, from which it returns to the receiving chamber of the left heart with its carbon dioxid replaced by oxygen. From the pumping chamber of the left heart the blood passes to all parts of the system, or body, and returns to the receiving chamber of the right heart with its oxygen replaced by carbon dioxid

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Keywords: ., bookcentury1900, bookdecade1920, bookpublishe, booksubjectbiology