White blood cells are also known as leukocytes and are unsung heroes of our immune system. They play a vital role in disease prevention. These microscopic cells circulate throughout our body and neutralise harmful pathogens such as bacteria, viruses, and fungi. 

There are various types of white blood cells, each with specialised functions ranging from engulfing invaders to producing antibodies. Their relentless vigilance and defensive capabilities are essential in safeguarding our health and keeping diseases at bay. Let us learn a bit more about the functions of white blood cells. 

Meaning of White Blood Cells

White blood cells lack colour but may exhibit a pale purple to pink hue when stained with dye and observed under a microscope. These minute cells have a spherical shape, with a clearly defined nucleus at their centre. 

The bone marrow, the soft tissue within the bones serves as the site for white blood cell production. White blood cells make up only 1% of your blood. There are 5 types of white blood cells – neutrophils, lymphocytes, basophils, eosinophils, and monocytes, however, they are less in number than red blood cells.² Along with the white blood cells, C-reactive protein tests are a frequent and convenient biomarker for systemic inflammation used in clinical diagnosis.

The Importance of White Blood Cells in the Body

White blood cells play an important role in defending your body against infections. As they circulate through your bloodstream and tissues, they act as vigilant commanders, identifying the site of an infection and alerting other white blood cells. This coordinated response helps protect your body from unknown invaders. 

When the white blood cell army reaches the infection site, they combat the intruders by generating antibody proteins. These antibodies attach to the organisms and neutralise them, ensuring your body’s defence against the threat.

Functions of White Blood Cells

Five types of white blood cells exist, each with a unique role in safeguarding your body. The functions of white blood cells are as follows: 

Type of White Blood Cells	Function	Cells per cu. mm of blood
Neutrophils	They combat infections by eliminating fungi, bacteria, and foreign particles.	2,500-6,600
Lymphocytes	They protect against viruses and generate antibodies to fight infections.	1,000-4,000
Basophils	These cells trigger allergic responses, leading to symptoms like sneezing, coughing, or a runny nose.	0-100
Eosinophils	They identify and destroy parasites and cancer cells and assist basophils in their allergic responses.	50-300
Monocytes	These white blood cells defend against infection by removing damaged cells.	200-800

Table 1: Functions of white blood cells and their optimum range.

Analysing WBC Normal Range

Your body typically generates approximately 100 billion white blood cells daily. When you fall ill, your body produces additional white blood cells to combat the bacteria, viruses, or other foreign substances responsible for the illness. As a result, your white blood cell count rises in response to the infection. Two types of white blood cell tests are: 

• The doctor may recommend a white blood cell count test to measure the white blood cells in your blood. When a blood sample is taken, the white blood cell count is measured as the number of cells per microliter of blood.
• White blood cell scan is another diagnostic procedure used to identify infections in the soft tissues of your body. In this test, the white blood cells in a blood sample are isolated and labelled with a radioactive isotope. These labelled cells are reintroduced into your bloodstream. An imaging test is then performed to locate areas in your body that exhibit signs of infection based on the distribution of the labelled white blood cells.

The white blood cell normal range is between 4,000 and 11,000 cells per microliter. Let us take a look at abnormal values: 

• A white blood cell count exceeding 11,000 cells per microliter is considered high white blood cell count, and its causes include conditions like bacterial infections, allergic reactions, or cancers like leukaemia. 
• A white blood cell count below 4,000 cells per microliter is considered low white blood cell count. Its causes include conditions like HIV/AIDS, liver or spleen disease, or lymphoma (bone marrow cancer).

How Does WBC Help in Disease Prevention?

White blood cells are frontline defenders in disease prevention. They identify and neutralise pathogens like bacteria, viruses, and fungi. These cells produce antibodies to target specific threats and coordinate immune responses and maintain overall health in the body. They also facilitate immune memory for faster recognition of previous invaders, which helps protect the body from similar infections in the future.

The white blood cell count is generally done with a complete blood count (CBC) test. These tests are performed as a part of regular checkups. If your test results show an increased or decreased white blood cell count, you may be at risk of infection even if you show no symptoms yet. Early diagnosis can play a major role in better treatment outcomes. 

Book WBC Test Online at Home With Orange Health Labs

Orange Health Labs offers a variety of tests, such as the lymphocyte test and CBC test at home, at your convenience. One such laboratory test you can book is the white blood cell count. Let’s take a look at the steps for booking a test:

• Visit the our webpage.
• You can select your location depending on where you live.
• Next, click on “Lab Tests” in the right corner.
• Finally, select the test white blood cell count or choose a test based on your doctor’s recommendation.

Lab test in Bangalore | Lab test in Mumbai | Lab test in Hyderabad | Lab test in Noida | Lab test in Delhi | Lab test in Gurgaon | Lab test Faridabad

White blood cells are indispensable in disease prevention. As defenders, they identify and neutralise pathogens, produce antibodies, and coordinate immune responses. Their existence ensures a robust defence against infections, thus safeguarding overall health.