Which of the following tissues is present at the joints between skull bones and makes them immovable?

Options

A. Cartilage
B. White fibrous connective tissue
C. Ligament
D. Areolar

Answer

To answer the question regarding which tissue is present at the joints between skull bones and makes them immovable, we will analyze the options provided and the characteristics of each tissue type.

### Step-by-Step Solution:

1. **Identify the Types of Tissues**:
- The options given are:
- A) Cartilage
- B) White fibrous connective tissue
- C) Ligament
- D) Areolar tissue

2. **Understand the Function of Each Tissue**:
- **Cartilage**: This is a flexible connective tissue found in various parts of the body, including joints, but it does not make skull bones immovable.
- **White Fibrous Connective Tissue**: This is a type of dense connective tissue that contains a high concentration of collagen fibers. It is known for providing strength and stability, particularly in areas where immobility is required.
- **Ligament**: This connective tissue connects bone to bone and allows for some movement; therefore, it does not make bones immovable.
- **Areolar Tissue**: This is a loose connective tissue that provides support and elasticity but is not specifically responsible for the immobility of skull bones.

3. **Focus on the Joints of Skull Bones**:
- The joints between skull bones are known as sutures. These joints are immovable and are primarily formed by white fibrous connective tissue, which is modified areolar tissue.

4. **Conclusion**:
- Based on the analysis, the tissue that is present at the joints between skull bones and makes them immovable is **B) White fibrous connective tissue**.

### Final Answer:
The correct answer is **B) White fibrous connective tissue**.

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