Collagen fibres are secreted by

Options

A. Fibroblast
B. Mast cells
C. Histocyte
D. Macrophages

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks about which type of cell secretes collagen fibers. Collagen fibers are a crucial component of connective tissue.

2. **Identifying the Options**: The options provided are fibroblast, mast cell, histiocytes, and macrophages. We need to analyze which of these cells is responsible for the secretion of collagen fibers.

3. **Connecting to Connective Tissue**: All the listed cells are associated with connective tissue. This indicates that the question pertains to the functions of different cells within this tissue type.

4. **Focusing on Fibroblasts**: Among the options, fibroblasts are known specifically for their role in the secretion of fibers. They are responsible for producing collagen and elastin fibers in connective tissue.

5. **Understanding Other Cells**:
- **Macrophages**: Their primary function is to engulf pathogens (disease-causing microorganisms) and not to secrete collagen.
- **Mast Cells**: These cells are involved in the secretion of heparin and other substances but do not produce collagen.
- **Histiocytes**: These are a type of macrophage and are primarily involved in immune responses.

6. **Conclusion**: Based on the functions of the cells discussed, the correct answer to the question is that collagen fibers are secreted by fibroblasts.

**Final Answer**: Collagen fibers are secreted by fibroblasts.

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