Most abundant WBCs in blood are

Options

A. neutrophils
B. Eosinophil
C. basophil
D. monocyte

Answer

To determine the most abundant type of white blood cells (WBCs) in the blood, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Types of WBCs**:
- There are five major types of white blood cells:
- Neutrophils
- Eosinophils
- Basophils
- Monocytes
- Lymphocytes

2. **Understand the Functions of Each Type**:
- **Neutrophils**: These are phagocytic cells that play a crucial role in the immune response by engulfing and destroying pathogens.
- **Eosinophils**: These cells are primarily involved in allergic reactions and combating parasitic infections.
- **Basophils**: They are involved in inflammatory responses and release substances like histamine and heparin.
- **Monocytes**: The largest type of WBCs, they are also phagocytic and differentiate into macrophages and dendritic cells.
- **Lymphocytes**: These cells are responsible for the production of antibodies and the adaptive immune response.

3. **Compare the Abundance of Each Type**:
- In a typical blood sample, the relative abundance of WBCs is as follows:
- Neutrophils: Approximately 60-70%
- Lymphocytes: Approximately 20-30%
- Monocytes: Approximately 2-8%
- Eosinophils: Approximately 1-4%
- Basophils: Less than 1%

4. **Determine the Most Abundant WBC**:
- Based on the percentages, neutrophils are the most abundant type of white blood cells in the blood.

5. **Conclusion**:
- Therefore, the answer to the question "Most abundant WBCs in blood are" is **Neutrophils**.