Plasma, This is what the majority of your blood is made out of., Platelets, This part of your blood helps stop you from bleeding., Red Blood Cells, This part of your blood consists of round, flat cells., White Blood Cells, This part of your blood helps fight against bacteria., Arteries, This blood vessel carries the blood away from the heart., Veins, This blood vessel carries the blood back to the heart., Heart, It is the strongest muscle in the human body.

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