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Blood is the liquid that travels through the veins and arteries of animals that carries oxygen to the cells and tissues while removing carbon dioxide from the cells and tissues. Whole blood is made of red blood cells, white blood cells, and platelets that are suspended within the plasma. Plasma makes up about 50- 55% of the content of blood. It contains proteins that help clot the blood upon injury in order to stop bleeding. It also contains glucose and other nutrients that it helps to transport to areas of need within the organism. Its globulins contain antibodies that help to fight off infection. Additionally, plasma plays a role in maintaining satisfactory blood pressure and pH balance in the body.
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