Leucocyte 99%

: Large cells that migrate into tissues to become macrophages, which engulf debris and pathogens.

: They move from the bloodstream into tissues via the lymphatic vasculature using chemokine-directed "amoeboid movement".

(also spelled leukocytes), commonly known as white blood cells (WBCs) , are the mobile units of the body's defensive system. They are produced in the bone marrow and lymph tissue and are distributed throughout the blood and lymphatic systems. Unlike red blood cells, all leucocytes have nuclei, which is their primary distinguishing feature. Classification of Leucocytes