Which type of joint has a fluid filled cavity for significant role in locomotion ?

Options

A. Fibrous joint
B. Cartilaginous joint
C. Synovial joint
D. All of the above

Answer

To answer the question "Which type of joint has a fluid-filled cavity for a significant role in locomotion?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Joints**:
- Joints are the points of contact between two or more bones. They allow for movement and flexibility in the skeletal system.

2. **Types of Joints**:
- There are several types of joints in the human body, including fibrous joints, cartilaginous joints, and synovial joints.

3. **Identifying Fluid-Filled Joints**:
- Among these types, synovial joints are unique because they contain a fluid-filled cavity known as the synovial cavity.

4. **Role of Synovial Fluid**:
- The synovial fluid present in these joints lubricates the articulating surfaces of the bones, reducing friction and allowing for smooth movement. This is essential for locomotion.

5. **Conclusion**:
- Therefore, the type of joint that has a fluid-filled cavity and plays a significant role in locomotion is the **synovial joint**.

### Final Answer:
The joint that has a fluid-filled cavity for a significant role in locomotion is the **synovial joint**.

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