Did You Know!
Human blood is composed of plasma, red blood cells, white blood cells, and platelets. Plasma is the liquid portion of blood that makes up about 55% of its volume and contains water, proteins, salts, and hormones. Red blood cells carry oxygen to tissues and remove carbon dioxide, while white blood cells are part of the immune system, defending the body against infections. Platelets are involved in blood clotting, which helps stop bleeding.
