1. Granulocytes:
* Neutrophils: These are the most abundant type of white blood cell and are the first responders to infection. They engulf and destroy bacteria and fungi through a process called phagocytosis.
* Eosinophils: These cells primarily target parasites and allergens. They release chemicals that kill parasites and help control allergic reactions.
* Basophils: These cells release histamine and other chemicals involved in inflammation and allergic reactions.
2. Agranulocytes:
* Lymphocytes: These cells are crucial for the adaptive immune response. They include:
* B lymphocytes (B cells): Produce antibodies that bind to specific pathogens, marking them for destruction.
* T lymphocytes (T cells): Directly kill infected cells or activate other immune cells.
* Monocytes: These cells transform into macrophages in tissues. Macrophages are powerful phagocytes that engulf and destroy pathogens, cellular debris, and even cancer cells.
In summary:
* Neutrophils, eosinophils, basophils, and monocytes fight infections by engulfing and destroying pathogens.
* Lymphocytes fight infections by specifically targeting and destroying pathogens through antibody production and cell killing.
These different types of white blood cells work together in a complex and coordinated way to protect the body from infection.
