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Blood is a vital fluid that circulates through the human body, delivering oxygen and nutrients to cells while removing waste products like carbon dioxide. Composed of plasma, red blood cells, white blood cells, and platelets, blood supports essential functions. Plasma, the liquid portion, carries nutrients, hormones, and proteins. Red blood cells transport oxygen, while white blood cells fight infections. Platelets help in clotting to prevent excessive bleeding. Blood plays a key role in regulating body temperature and maintaining pH balance. Its circulati
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