Portal:Biology/Selected article

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White blood cell

Red White Blood cells.jpg

White blood cells are the type of blood cells that fight infection in the body by seeking-out and destroying disease-causing microorganisms. Also known as leukocytes, the white blood cells are responsible for maintaining the immune system’s response to foreign substances and infection. They play a number of roles in immune response, including antibody production, attacking and destroying cancer cells, and producing substances that kill tumors. They are divided into many different categories on the basis of their functions and appearance.