Cells of human blood can be arranged in a series of increasing number per cubic millimeter of blood as follows

Options

A. Erythrocytes `lt` Lymphocytes `lt` Platelets `lt` Basophils `lt` Neutrophils
B. basophils `lt` Lymphocytes `lt` Neutrophils `lt` Platelets `lt` Erthrocytes
C. Lymphocytes `lt` Basophils `lt` Platelets `lt` Neutrophils `lt` Erthrocytes
D. Neutrophils `lt ` Basophils `lt` Lymphocytes `lt` Platelets `lt ` Erythrocytes

Answer

To solve the question of arranging the cells of human blood in increasing order based on their number per cubic millimeter, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Types of Blood Cells**: The main types of cells in human blood include:
- Erythrocytes (Red Blood Cells - RBCs)
- Platelets
- White Blood Cells (WBCs), which include:
- Neutrophils
- Lymphocytes
- Basophils

2. **Determine the Counts of Each Cell Type**:
- **Erythrocytes (RBCs)**: Approximately 5 to 5.5 million cells per cubic millimeter.
- **Platelets**: Approximately 150,000 to 350,000 cells per cubic millimeter.
- **White Blood Cells (WBCs)**: Total count is around 4,000 to 11,000 cells per cubic millimeter, with the following breakdown:
- **Neutrophils**: About 60-65% of total WBCs, which translates to around 2,400 to 7,150 neutrophils per cubic millimeter (assuming a total WBC count of 4,000).
- **Lymphocytes**: About 25% of total WBCs, translating to around 1,000 to 2,500 lymphocytes per cubic millimeter.
- **Basophils**: Very low count, approximately 0.5 to 1% of total WBCs, which would be around 20 to 110 basophils per cubic millimeter.

3. **Arrange the Counts in Increasing Order**:
- **Basophils**: 20 to 110 cells/mm³ (least)
- **Lymphocytes**: 1,000 to 2,500 cells/mm³
- **Neutrophils**: 2,400 to 7,150 cells/mm³
- **Platelets**: 150,000 to 350,000 cells/mm³
- **Erythrocytes**: 5,000,000 to 5,500,000 cells/mm³ (most)

4. **Final Arrangement**: Based on the above counts, the increasing order of blood cells per cubic millimeter is:
- Basophils < Lymphocytes < Neutrophils < Platelets < Erythrocytes

5. **Select the Correct Option**: The correct option that represents this order is option 2: Basophils, Lymphocytes, Neutrophils, Platelets, Erythrocytes.