The primary role of leucocytes is to protect the body against infectious diseases and foreign entities. They achieve this through several critical processes:
: Release histamine and other chemicals during inflammatory reactions. Agranulocytes : Lack visible granules and include: leucocyte
: 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. The primary role of leucocytes is to protect
: Large cells that migrate into tissues to become macrophages, which engulf debris and pathogens. which engulf debris and pathogens.