Final answer:
White blood cells, or leukocytes, are specialized immune system cells crucial in defending the body against infections.
Explanation:
White blood cells, also known as leukocytes, are specialized immune system cells that play a crucial role in identifying and eliminating pathogens, debris, and abnormal body cells. They consist of various types such as monocytes, macrophages, neutrophils, eosinophils, and basophils, all involved in defending the body against infections.
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