Which of these is not found in connective tissue

Options

A. Collagen fibres
B. Basement membrane
C. Hyaluronic acid
D. Fluid.

Answer

To determine which of the given options is not found in connective tissue, let's analyze each option step by step.

### Step 1: Understand the Components of Connective Tissue
Connective tissue is a type of tissue that supports, binds together, and protects other tissues and organs in the body. It includes various components such as fibers, cells, and a ground substance.

### Step 2: Analyze Each Option
1. **Collagen Fibers**:
- Collagen fibers are a major component of connective tissue. They provide strength and support and are found in various types of connective tissues, including areolar and fibrous connective tissues.
- **Conclusion**: Collagen fibers are found in connective tissue.

2. **Basement Membrane**:
- The basement membrane is a thin layer of extracellular matrix that separates epithelial cells from underlying connective tissue. It is not a component of connective tissue itself but rather serves as a boundary between different types of tissues.
- **Conclusion**: The basement membrane is not found in connective tissue.

3. **Hyaluronic Acid**:
- Hyaluronic acid is a component of the extracellular matrix and is involved in lubrication and hydration of connective tissues, particularly in joints and cartilage.
- **Conclusion**: Hyaluronic acid is found in connective tissue.

4. **Fluid**:
- Various fluids, such as blood and lymph, are considered types of connective tissue. They play crucial roles in transportation and immune functions.
- **Conclusion**: Fluid is found in connective tissue.

### Step 3: Identify the Correct Answer
Based on the analysis:
- **Collagen Fibers**: Found in connective tissue.
- **Basement Membrane**: **Not found in connective tissue.**
- **Hyaluronic Acid**: Found in connective tissue.
- **Fluid**: Found in connective tissue.

Thus, the correct answer is **Basement Membrane**.

### Final Answer
The option that is not found in connective tissue is **Basement Membrane**.

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