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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.
Granular leukocytes are multilobed nuclei containing leukocytes or white blood cells and are of three types. We shall discuss all about their types and functions in the following article. One of the most important cells of our immune system are the leukocytes or white blood cells (WBCs). These cells are free from hemoglobin and belong to the reticuloendothelial cell system. White blood cells are divided into two types, granular and agranular leukocytes.