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Home Â» Humoral Â» Leukocyte. Definition. noun, plural: leukocytes. Any of the blood cells that lack hemoglobin, colourless and with nucleus. Its major function involves the body's immune system, protecting the body against invading microorganisms and foreign particles.
What are Leukocytes. Leukocytes are made up of different types of white blood cells, each with their own specific role in the bodyâs immune system. Neutrophils â These are the first white blood cells (WBCs) to travel to where an infection is. Monocytes â They respond to inflammation and they attack the foreign matter.