Which of the following diarthrotic joints allows for the greatest degree of movement?

Options

A. Ball-and-socket
B. Pivot
C. Hinge
D. Gliding

Explanation

**Step-by-Step Solution:**

1. **Understanding Diarthrotic Joints**:
- Diarthrotic joints, also known as synovial joints, are joints that allow for a significant range of motion. They are characterized by a joint cavity filled with synovial fluid, which reduces friction and allows for smooth movement.

2. **Identifying Types of Diarthrotic Joints**:
- The question presents four types of diarthrotic joints:
- Ball and Socket Joint
- Pivot Joint
- Hinge Joint
- Gliding Joint

3. **Analyzing Movement Types**:
- **Ball and Socket Joint**: Allows for multiaxial movement, meaning it can move in multiple directions (e.g., shoulder and hip joints).
- **Pivot Joint**: Allows for uniaxial movement, meaning it can rotate around a single axis (e.g., the joint between the first and second cervical vertebrae).
- **Hinge Joint**: Also allows for uniaxial movement, functioning like a door that opens and closes (e.g., elbow and knee joints).
- **Gliding Joint**: Allows for limited movement in a unilateral direction, mostly sliding movements (e.g., joints between the carpal bones in the wrist).

4. **Determining the Joint with the Greatest Movement**:
- Among the joints listed, the ball and socket joint provides the greatest degree of movement due to its ability to move in multiple axes.

5. **Conclusion**:
- Therefore, the diarthrotic joint that allows for the greatest degree of movement is the **Ball and Socket Joint**.

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