Blood - Transport O2, nutrients and waste around the body, Red Blood cells - Carries O2, White Blood Cells - Fights Infection, Clotting - Stops blood flowing out of a cut, Infection - Is fought by white blood cells, Cappillaries - Transports blood and allows exchange, Platelets - clot the blood , haemoglobin - red chemical that carries oxygen in red cells, most numerous blood cells - red cells , leukaemia - too many white blood cells ,

Blood cells and functions

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