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White blood cell (WBC)
White blood cells (WBCs), also known as leukocytes, are a vital part of the immune system that help protect the body against infections and foreign invaders, such as bacteria, viruses, and fungi. There are several types of white blood cells, including neutrophils, lymphocytes, monocytes, eosinophils, and basophils, each playing a different role in immune defense.
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