Blood carries and food to the cells 
hemoglobin present in the blood gets attached to oxygen and forms oxy-hemoglobin and thus delivers oxygen to the cells 


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The red mixture which carries oxygen and food to every cell is blood. And when the oxygen is mixed with blood it becomes oxyhaemoglobin.Blood flows throughout the body so blood carries food,oxygen etc... To each and every part/cell in the body. Hope this helps u.