Thymus derived cells forming part of cell mediated immune system are

Options

A. B-lymphocytes
B. T-lymphocytes
C. cancer cells
D. fibrocytes

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about thymus-derived cells that are part of the cell-mediated immune system. This indicates we need to identify a specific type of immune cell that originates from the thymus.

2. **Identifying the Thymus**: The thymus is an organ located in the upper chest, behind the sternum. It is crucial for the development of certain immune cells.

3. **Role of the Thymus**: The thymus is primarily responsible for the maturation of T lymphocytes (T cells), which are essential components of the cell-mediated immune response.

4. **Types of Immune Cells**: There are various types of immune cells, but the question specifically refers to those derived from the thymus. While B lymphocytes (B cells) are also important for immunity, they mature in the bone marrow, not the thymus.

5. **Conclusion**: The thymus-derived cells that form part of the cell-mediated immune system are T lymphocytes (T cells).

6. **Final Answer**: T lymphocytes (T cells) are the thymus-derived cells that are part of the cell-mediated immune system.

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