The correct arrangement of blood cell is

Options

A. In terms of quantity: erythrocytes `gt` lymphocytes `gt` monocytes `gt` thrombocytes
B. In terms of life span: thrombocytes `gt` erythrocytes `gt` monocytes `gt` lymphocytes
C. In terms of size : monocytes `gt` lymphocytes `gt` erythrocytes `gt` thrombocytes
D. In terms of motility : erythrocytes `gt` thrombocytes `gt` lymphocytes `gt` monocytes

Answer

To determine the correct arrangement of blood cells based on various parameters such as quantity, lifespan, size, and motility, we can break down the information provided in the video transcript into a structured solution.

### Step-by-Step Solution:

1. **Understanding Blood Cells**:
- Blood cells are primarily classified into three types: Red Blood Cells (RBCs or Erythrocytes), White Blood Cells (WBCs), and Platelets (Thrombocytes).

2. **Arrangement by Quantity**:
- **RBCs**: Approximately 4 to 6 million cells per cubic millimeter, making them the most abundant.
- **Platelets**: About 150,000 to 400,000 per microliter (or 1.5 to 4 lakhs).
- **WBCs**: Generally around 4,000 to 11,000 per microliter, with specific types like lymphocytes ranging from 1,000 to 4,800.
- **Monocytes**: Make up about 1 to 10% of WBCs.
- **Correct Order by Quantity**: RBCs > Platelets > WBCs (including Lymphocytes and Monocytes).

3. **Arrangement by Lifespan**:
- **Platelets**: Approximately 10 days.
- **RBCs**: Approximately 120 days.
- **Monocytes**: About 71 hours in circulation.
- **Lymphocytes**: Can survive from a week to several months.
- **Correct Order by Lifespan**: Platelets < Monocytes < RBCs < Lymphocytes.

4. **Arrangement by Size**:
- **Monocytes**: The largest of the blood cells.
- **Lymphocytes**: Smaller than monocytes but larger than RBCs.
- **RBCs**: Smaller than lymphocytes.
- **Platelets**: The smallest of all.
- **Correct Order by Size**: Monocytes > Lymphocytes > RBCs > Platelets.

5. **Motility**:
- All WBCs are motile, and platelets have some motility but are less motile compared to WBCs.
- **Correct Order by Motility**: All WBCs > Platelets.

6. **Final Correct Arrangement**:
- Based on the above parameters, the correct arrangement of blood cells can be summarized as:
- **By Quantity**: RBCs > Platelets > WBCs
- **By Lifespan**: Platelets < Monocytes < RBCs < Lymphocytes
- **By Size**: Monocytes > Lymphocytes > RBCs > Platelets
- **By Motility**: All WBCs > Platelets

### Conclusion:
The correct arrangement of blood cells based on size is Monocytes > Lymphocytes > RBCs > Platelets.