The fibres of connectives tissues are secreted by  

Options

A. mast cells
B. fibroblasts
C. fibrocytes
D. fibrinogen

Answer

**Step-by-Step Solution:**

1. **Understanding Connective Tissue**: Connective tissue is one of the four main types of tissues in the body. It plays a crucial role in binding and supporting other tissues and organs.

2. **Identifying the Components of Connective Tissue**: Connective tissue is made up of various components, including cells, fibers, and a ground substance. The fibers provide strength and support to the tissue.

3. **Analyzing the Options**: The question provides four options regarding which cells secrete the fibers of connective tissue:
- **Mast Cell**: A type of white blood cell involved in immune responses but does not produce connective tissue fibers.
- **Fibroblast**: A key cell type in connective tissue responsible for synthesizing and secreting fibers and other components of the extracellular matrix.
- **Fibrocyte**: A less active form of fibroblast that maintains the connective tissue but does not primarily produce fibers.
- **Fibrinogen**: A protein involved in blood clotting, produced by the liver, and not related to connective tissue fiber production.

4. **Identifying the Correct Answer**: Among the options, **fibroblast** is the correct answer as it is the cell type that actively secretes the fibers of connective tissue.

5. **Conclusion**: Therefore, the fibers of connective tissues are secreted by fibroblasts.

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