White blood cells are one the most important parts of our immune system. The various types of white blood cells work together to protect us against bacteria, viruses, parasites, infections of all types, toxins, and even the development of cancer.
Each type of white blood cell has a specific job or jobs. The term 'white blood cells' includes the following cell types:Neutrophils, the most common type of white blood cell, also are called polymorphonuclear leukocytes, PMNs, and polys. They are produced in the bone marrow and circulate in the blood, where they can respond to infection and attack bacteria directly. This white blood cell is important for monitoring during cancer therapy.