Which of the following type of joint allows considerable movements and therefore, play a significant role in locomotion ?

Options

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

Answer

To determine which type of joint allows considerable movements and plays a significant role in locomotion, let's analyze the options provided:

1. **Synovial Joints**:
- Synovial joints are characterized by the presence of a synovial cavity filled with synovial fluid.
- This fluid allows for smooth movement between the articulating bones.
- Synovial joints are highly mobile and enable a wide range of movements, making them crucial for locomotion.
- Examples include the knee, elbow, and shoulder joints.

2. **Fibrous Joints**:
- Fibrous joints are connected by dense connective tissue, primarily collagen.
- These joints allow very little movement, as the bones are tightly bound together.
- Examples include sutures in the skull.
- Therefore, fibrous joints do not play a significant role in locomotion.

3. **Cartilaginous Joints**:
- Cartilaginous joints are connected entirely by cartilage.
- They allow more movement than fibrous joints but less than synovial joints.
- Examples include the joints between the vertebrae.
- While they do allow some movement, they are not as mobile as synovial joints.

4. **All of the Above**:
- This option implies that all the mentioned joints allow considerable movement, which is incorrect based on our analysis.

**Conclusion**: The type of joint that allows considerable movements and plays a significant role in locomotion is the **synovial joint**.