White blood cells have been trained to recognize body cells called lymphocytes and distinguish them from foreign material that is called antigens.
White blood cells are also called leucocytes and they are types of blood cell that is involved with an immune response, or part of the immune system.
The white blood cells of the immune system are involved in protecting the body against both infectious disease and foreign invaders.
Antigens are substances that induces an immune response and are usually foreign invaders. The white blood cells helps the identify this antigens and separate them from lymphocytes.
Learn more about white blood cells at: https://brainly.com/question/19202269
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