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Blood BLOODEssence of lifeUncontrolled loss can lead to deathHas magical qualitiesThought to define our character and emotionsBlue blood ⎯ people with noble bloodline“bad” blood ⎯ criminalsAnger causes blood to “boil”Fear makes it “curdle”Performs many functions essential to life and reveal much about our healthBlood maintains homeostasis in several ways8% of total body weightFUNCTIONSTransport of gases, nutrients.