How do white blood cells contribute to the immune system ?

White blood cells play a crucial role in the immune system by identifying and destroying pathogens such as bacteria, viruses, and other foreign invaders. There are several types of white blood cells, each with specific functions:

1. Neutrophils: These are the most abundant type of white blood cells and are the first responders to infections. They engulf and destroy bacteria and other pathogens.

2. Lymphocytes: These are a type of white blood cell that includes T cells and B cells. T cells help to coordinate the immune response and directly attack infected cells, while B cells produce antibodies that target specific pathogens.

3. Monocytes: These cells help to clean up debris and dead cells in the body. They can also differentiate into macrophages, which engulf and digest pathogens.

4. Eosinophils: These cells are involved in fighting parasitic infections and allergic reactions.

5. Basophils: These cells release histamine and other chemicals that help to trigger inflammation and attract other immune cells to the site of infection.

Overall, white blood cells work together to identify and eliminate pathogens, regulate the immune response, and remember past infections to provide long-term immunity.