Word: venous
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...arteries to tiny arterioles, whence it seeps into capillaries. From the capillaries the blood seeps into minute venules, then flows through the veins back to the heart. On the way the blood delivers oxygen to the body cells and picks up carbon dioxide and other waste products. The polluted venous blood which the heart receives it drives into the lungs. The lungs remove carbon dioxide from the blood, add fresh oxygen. Then the blood goes back to the heart for further circulation. Valves in the heart and veins prevent the blood stream backing...
...plate. The head's eyes moved. They closed when a strong light was flashed at them. The ears wiggled. The tongue ejected a piece of cotton soaked with acid, and swallowed a piece of cheese. For three and a half hours these natural reactions continued. By that time the venous blood became too heavy for the pump to oxygenate thoroughly. The dog's head began to yawn for the air which its lungs would have used so vitally. Gaping, like a pneumonia victim, the head died completely...
...push the blood onward to the ends of the body-to the brain, the vitals, the tissues of the heart itself, the limbs, the skin. From the terminal arterioles tiny capillaries suck this blood into venules like tiny, feeble fountains trickling foul blood back to the heart. This venous blood the heart pumps into the lungs for the filth to be burnt there by inhaled oxygen, carried away as carbon dioxide. From the lungs the blood returns red to the heart, which starts it again through the arteries...