Leucocyte

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

: Specific cell adhesion molecules (CAMs) allow leucocytes to stick to vascular endothelial cells, a process essential for reaching the site of an injury or infection.

(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 leucocyte

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

: Certain leucocytes, like neutrophils and macrophages, ingest and destroy harmful germs and cellular debris. : Large cells that migrate into tissues to

: Key players in the adaptive immune system, further divided into T cells (cell-mediated immunity) and B cells (antibody production). Function and Mechanism

: Primarily involved in battling parasitic infections and allergic responses. They are produced in the bone marrow and

: The most numerous, acting as first responders to infection.