The Circulatory System

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The circulatory system is made up of the , blood and blood vessels. Blood is composed of , red blood cells, white blood cells and platelets. Plasma transports dissolved food, wastes, antibodies, hormones and around the body. Red blood cells contain which transports oxygen from the to all parts of the body. White blood cells fight . Platelets clot the blood at . carry blood away from the heart. carry blood to the heart. Veins contain which prevent the backflow of blood. link arteries to veins. They are very thin blood vessels with very thin that allow oxygen and food pass in and out of the bloodstream.