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There are a few major substances that make up the blood in our bodies and there are other substances that are also found in blood. The main substances are plasma, a liquid like substance, the platelets or thrombocytes which help the clotting process of blood. Then the red blood cells (RBC) or erythrocytes, and finally the white blood cells or leukocytes which protects the body from harmful infections.

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10y ago
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13y ago

White blood cells red blood cells Platelets

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11y ago

oxygen

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Q: What substances make up blood and their functions?
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