Leucocyte

: Certain leucocytes, like neutrophils and macrophages, ingest and destroy harmful germs and cellular debris.

: Primarily involved in battling parasitic infections and allergic responses. leucocyte

(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 They are produced in the bone marrow and

Leucocytes are generally classified by their cell lineage into or lymphoid cells and further divided based on the presence of granules in their cytoplasm: Granulocytes : Contain visible granules and include: : Key players in the adaptive immune system,

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

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

: 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.