Which is the correct sequence of arrangement of types of WBC in decreasing order in terms of number per 3 mm of human blood

Options

A. Eosinophils gt basophils gt neutrophils
B. Basophils gt eosinophils gt neutrophils
C. Neutrophils gt eosinophils gt basophils
D. Eosinophils gt neutrophils gt basophils

Explanation

To determine the correct sequence of arrangement of types of white blood cells (WBCs) in decreasing order in terms of number per cubic millimeter (3 mm³) of human blood, we need to first understand the different types of WBCs and their relative proportions in the blood.

### Step-by-Step Solution:

1. **Identify the Types of WBCs**:
- WBCs, also known as leukocytes, are classified into two main categories:
- Granulocytes
- Agranulocytes

2. **List the Types of Granulocytes**:
- Granulocytes include:
- Neutrophils
- Eosinophils
- Basophils

3. **List the Types of Agranulocytes**:
- Agranulocytes include:
- Lymphocytes
- Monocytes

4. **Know the Percentage Composition of Each Type**:
- Neutrophils: 60-65%
- Lymphocytes: 20-25%
- Monocytes: 3-8%
- Eosinophils: 2-3%
- Basophils: 0.5-1%

5. **Arrange the WBCs in Decreasing Order**:
- Based on the percentages, the order from highest to lowest is:
1. Neutrophils (60-65%)
2. Lymphocytes (20-25%)
3. Monocytes (3-8%)
4. Eosinophils (2-3%)
5. Basophils (0.5-1%)

6. **Final Sequence**:
- Therefore, the correct sequence of WBCs in decreasing order in terms of number per cubic millimeter of human blood is:
- Neutrophils > Lymphocytes > Monocytes > Eosinophils > Basophils