Granulocytes are a type of white blood cell that mature into different types of cells, each with a specific role in the immune system:

* Neutrophils: The most abundant type of granulocyte, neutrophils are phagocytes that engulf and destroy bacteria, fungi, and other pathogens.

* Eosinophils: Primarily involved in fighting parasitic infections and allergic reactions. They release chemicals that kill parasites and contribute to inflammation.

* Basophils: Release histamine and other chemicals that contribute to allergic reactions and inflammation. They also play a role in the body's response to parasitic infections.

So, while granulocytes are a general category, they differentiate into these three specialized cells with distinct functions in the immune system.