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Leukocytes are a type of white blood cell. When urine is positive for leukocytes, there are leukocytes in the urine. White blood cells in urine are typically a sign of infection.urpose. Leukocytes are white blood cells, the body's defense mechanism against invaders such as infection and disease. When foreign materials enter the body, white blood cells attack it by destroying infectious agents or producing antibodies.
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.