Here's why:
* Defense: White blood cells are responsible for fighting off infections and diseases. They do this by identifying and destroying pathogens (like bacteria, viruses, and parasites) and by removing damaged cells.
* Repair: Some white blood cells are involved in the healing process. They release substances that promote tissue repair and help control inflammation.
Specific types of white blood cells and their functions:
* Neutrophils: First responders to infection, engulf and destroy bacteria.
* Lymphocytes:
* T cells: Attack infected cells directly and regulate the immune response.
* B cells: Produce antibodies to fight infections.
* Macrophages: Engulf and destroy pathogens, cellular debris, and foreign particles.
* Eosinophils: Fight parasitic infections and allergic reactions.
* Basophils: Release histamine and other chemicals involved in inflammation.
Let me know if you'd like to know more about a specific type of white blood cell!