Blood is a vital fluid in the human body, responsible for transporting oxygen, nutrients, and waste products. It is made up of plasma, red blood cells, white blood cells, and platelets. Plasma, the liquid portion of blood, carries nutrients, hormones, and waste products. Red blood cells carry oxygen, while white blood cells fight infections, and platelets help with clotting. Blood transfusions are commonly used in medicine to replace lost blood, treat medical conditions, or support patients duri

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