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.,

Circulatory System

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