Types Of White Blood Cells And Their Functions

Different types of white blood cells and their functions play an important role in medical science. White blood cell, another name of which are leukocytes are the cells work in the whole immune system of human body and involved in protecting the human body from any infectious diseases or foreign materials. As they protect the human body from threats, they are treated as the ‘Guard of the human body’. These blood cells are generated from the red bone marrow. Actually, the white blood cells are not found too many in the human body because they leave the blood and entered into other tissues of the body.

The types of white blood cells and their functions can be separated into two broad categories. Those are:

Granulocytes: The categorization is made upon the presence of various staining granules seen in the cytoplasm while viewing through the light microscope.

Agranulocytes: This category is made by the noticeable nonappearance of granules in cytoplasm.

The types of white blood cells and their functions often make confusion as it can be discussed in both 5 categories and 7 categories. Anyway, here we will discuss about 5 categories of the white blood cells.


Neutrophils protects the body from the infections created from bacteria and fungus. They are typically the earlier responders of the microbial infection. They are generally known as polymorphonuclear leukocytes. But, in technical sense, polymorphonuclear (PMN) means all of the granulocytes. The Neutrophils are seen mostly in early stages of the acute inflammation. They construct 60-70% of the total leukocytes in s human blood. The estimated life is 5.4 days.


Eosinophils mainly contract with the parsitic infections. These are also treated as the major inflammatory cells when allergic reactions are considered. One of the most important causes of eosinophilia are the allergies. For example, asthma, and hives; hay fever as well as the parasitic infections. Normally, the nucleus of the Eosinophils are bi-lobed. The color of the cytoplasm becomes pink-orange because of these leucocytes.


Basophils are primarily make the antigen and allergic responses. They do it by freeing the chemical histamin. The nucleus of Basophils can be bi-lobed like the previous one and also can be tri-lobed. It’s really tough to see these.


Among the The types of white blood cells and their functions Lymphocytes are little more common in lymphatic system. Lymphocytes can be distinguished by having the intensely staining nucleus. It may be eccentric or comparatively little sum of cytoplasm. These Lymphhocytes can be categorized into three. Such as: B Cells, T Cells and Natural Killer cells.


Monocytes act like a ‘Vacuum Cleaner’ in human body. But, their life is little longer than the Netrophills. They help greatly to make the antibody response. It helps to remove the blood cells. The nucleus of the monocyte has the shape like the Kidney of the humanbody. These leucocytes also produce the abundant cytoplasm.

So, these are the types of white blood cells and their functions. The white blood cells play the most vital role in human body when it face any danger.