Smallest blood cells `:-`

Options

A. RBC
B. WBC
C. Platelets
D. None

Answer

**Step-by-Step Solution:**

1. **Identify the Types of Blood Cells**: The main types of blood cells in the human body are red blood cells (RBCs), white blood cells (WBCs), and platelets.

2. **Understand the Characteristics of Each Type**:
- **Red Blood Cells (RBCs)**: These cells are responsible for carrying oxygen throughout the body. They are larger than platelets.
- **White Blood Cells (WBCs)**: These cells are part of the immune system and help fight infections. They are generally larger than both RBCs and platelets.
- **Platelets**: These are small, irregularly shaped cell fragments that play a crucial role in blood clotting.

3. **Focus on Platelets**: Platelets are produced from larger cells called megakaryocytes in the bone marrow. They are unique because they do not have a nucleus and are much smaller in size compared to RBCs and WBCs.

4. **Compare Sizes**: The diameter of platelets is approximately 20% that of red blood cells, making them significantly smaller.

5. **Conclusion**: Given that platelets are smaller than both red and white blood cells, the smallest blood cells in the human body are platelets.

**Final Answer**: The smallest blood cells are platelets.

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