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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.
Types of Leukocytes. Leukocytes, which is an alternate name for white blood cells, are responsible for a stronger immune system of the body. They are present throughout our body, including the blood and lymphatic system, to safeguard our body from infectious diseases and unknown bodies that enter our system to harm us.eukocyte is another name for white blood cells. There are different types of leukocytes that exist in our body, each having a significant function of their own.