Platelets are the cell fragments produced from

Options

A. Thrombocytes
B. Megakaryocytes
C. Monocytes
D. Mast cell

Answer

**Step-by-Step Solution:**

1. **Understanding Platelets**: Platelets are small cell fragments in the blood that play a crucial role in the process of blood clotting. They help prevent excessive bleeding when there is an injury.

2. **Identifying the Options**: The question presents four options: thrombocytes, megakaryocytes, monocytes, and mast cells. We need to determine which of these is the source of platelets.

3. **Analyzing Each Option**:
- **Thrombocytes**: This is actually another name for platelets. Therefore, this option does not refer to the source of platelets.
- **Mast Cells**: These cells are involved in immune responses and do not produce platelets. They release chemicals like histamine and heparin but are not related to platelet formation.
- **Monocytes**: These are a type of white blood cell involved in the immune response. They do not produce platelets, but rather play a role in inflammation and defense against pathogens.
- **Megakaryocytes**: These are large bone marrow cells that are the precursors to platelets. They undergo a process of fragmentation to release platelets into the bloodstream.

4. **Conclusion**: The correct answer is that platelets are cell fragments produced from **megakaryocytes**.

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