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WBC Full Form: White Blood Cell

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WBC Full Form, Importance, and Its Types

WBC stands for White Blood Cells, which are an essential part of the immune system. They help the body fight infections, bacteria, viruses, and other harmful invaders. WBCs are produced in the bone marrow and circulate in the bloodstream and lymphatic system. 


The normal WBC count ranges between 4,000 to 11,000 cells per microliter of blood. A low or high WBC count may indicate an infection, immune disorder, or other health conditions, requiring medical attention.


Different Types of WBC

Type of WBC

Function

Neutrophils

First line of defense; fight bacterial and fungal infections through phagocytosis.

Lymphocytes

Include B-cells (produce antibodies), T-cells (destroy infected cells), and NK cells (attack tumors and viruses).

Monocytes

Transform into macrophages to engulf and digest pathogens and dead cells.

Eosinophils

Defend against parasitic infections and regulate allergic reactions.

Basophils

Release histamine and other chemicals during allergic responses and inflammation.


Structural Classification of WBCs

Category

Types

Description

Granulocytes

Neutrophils

Contain multi-lobed nuclei and granules; fight infections through phagocytosis.


Eosinophils

Bi-lobed nucleus with granules; combat parasites and regulate allergies.


Basophils

Least common WBCs with granules; release histamine in allergic reactions.

Agranulocytes

Lymphocytes

Large nucleus, no granules; include B-cells, T-cells, and NK cells for immunity.


Monocytes

Largest WBC with kidney-shaped nucleus; transform into macrophages to engulf pathogens.


Importance of White Blood Cells (WBCs)

White Blood Cells (WBCs) play a crucial role in the immune system by protecting the body from infections, diseases, and foreign invaders. Their key functions include:


  • Fighting Infections – WBCs detect and destroy bacteria, viruses, and fungi.

  • Immunity Development – Lymphocytes produce antibodies and provide long-term immunity.

  • Inflammatory Response – Basophils and eosinophils help regulate allergic reactions and inflammation.

  • Tissue Repair & Cleanup – Monocytes transform into macrophages to remove dead cells and toxins.


WBCs are essential for overall health, ensuring a strong defense system against diseases.


Diseases related to WBC:

  1. Leukocytosis – An abnormally high WBC count, often due to infections, inflammation, or stress.

  2. Leukopenia – A low WBC count, making the body more prone to infections and immune disorders.

  3. Leukemia – A type of blood cancer where abnormal WBCs multiply uncontrollably.

  4. Lymphoma – A cancer affecting lymphocytes, weakening the immune system and lymphatic function.

  5. Myelodysplastic Syndrome (MDS) – A condition where bone marrow fails to produce healthy WBCs.

  6. Neutropenia – A significant drop in neutrophils, increasing the risk of severe infections.

  7. Eosinophilia – A high eosinophil count, usually due to allergies, infections, or autoimmune diseases.

  8. Monocytosis – An increased number of monocytes, often linked to chronic infections or inflammation.


Conclusion:

White Blood Cells (WBCs) are vital components of the immune system, protecting the body from infections, allergens, and harmful pathogens. Maintaining a healthy WBC count is essential for overall well-being.


For students preparing for medical exams, Vedantu's NEET syllabus offers easy-to-understand study materials on WBC functions, immunity, and human body systems.


Essential Study Materials for NEET UG Success

FAQs on WBC Full Form: White Blood Cell

1. What is WBC's normal range?

The normal WBC count ranges between 4,000 to 11,000 cells per microliter of blood.

2. What does it mean if WBC is high?

A high WBC count (leukocytosis) may indicate an infection, inflammation, stress, immune disorder, or leukemia.

3. What are the full forms of RBC and WBC?

  • RBC – Red Blood Cells

  • WBC – White Blood Cells

4. What is WBC in disease?

WBCs help fight infections, but abnormal levels can be linked to diseases like leukemia, autoimmune disorders, and severe infections.

5. What does WBC mean in infection?

A rise in WBC count is a sign that the body is fighting bacterial, viral, or fungal infections.

6. What are the 7 types of blood cells?

The seven types of blood cells include neutrophils, lymphocytes, monocytes, eosinophils, basophils, red blood cells (RBCs), and platelets.

7. What happens if WBC is low?

A low WBC count (leukopenia) weakens the immune system, making the body more vulnerable to infections and diseases.

8. What does WBC positive mean?

It means that the WBC count is elevated, usually due to an infection, stress, or immune response.

9. How to treat high WBC?

Treatment depends on the cause and may include antibiotics for infections, anti-inflammatory drugs, or medications for underlying conditions.